Guardian Interlock (guardianinterlock.com) has a 3.8 out of 5 rating on OK.one, based on 60 user reviews collected here. It is listed under Electronics & Technology and its reputation is mixed. Opinions are polarized: 70% rate it 4 stars or higher while 28% give 1 star; The business has replied to 100% of negative reviews; 50 of them were added in the last 12 months. Last updated 2026-08-10.
What people say
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Luke Hibdon · 6 reviews · Experienced 2025-10-31 ·
★★★★★
This company provides privacy violations and is repugnant to the constitution of the United States. LMG Holdings inc.is a data broker and uses your GPS location in real time as well as using facial re
This company provides digital identity infrence data that includes Character disposition , habits , traits, ability, cognitive response and intelligence analysis , behavioral mental health and facial recignition recording that is kept with no notice UCC 1-308
Reply from Guardian Interlock2025-11-03
Thank you for sharing your concerns. The settings on your device are set by state regulations, not by Guardian or the interlock industry. There is no face recognition on our products. Also, GPS is only recorded in states that require it; yours is not one of them, so we've never recorded GPS data for you. Rest assured that we're not using more advanced/expensive equipment than necessary.
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GARY DAVIS · 1 review · Verified · Experienced 2025-06-04 ·
★★★★★
Great customer service and support…
Great customer service and support along with great attitudes 👍
Reply from Guardian Interlock2025-10-24
We’re thrilled to hear that Laura provided such great support! Recognizing our team members for their hard work is one of the best parts of what we do, and your feedback will absolutely be shared with them.
Yes they where very helpful and professional and fast work done thank you
Reply from Guardian Interlock2025-10-17
Thank you for sharing such kind words about Damond. Exceptional service is what we strive for every day, and knowing that your experience reflected that means a lot to us.
I was on the phone for 2 hours getting passed around until I spoke to Tawana! What a wonderful lady. I will definately be recommending friends because of her! She answered all my questions and some!
Reply from Guardian Interlock2025-10-13
We truly appreciate you highlighting Tawana. Our team takes pride in providing excellent support, and it’s great to know their efforts stood out to you.
It’s great to hear that Jair was able to assist you so well. Our team is dedicated to supporting our customers every step of the way, and your recognition reinforces the effort they put in every day.
My experience was wonderful, but all because of Danny who I dealt with on the phone. He was patient understanding and very kind!
Reply from Guardian Interlock2025-09-30
We really appreciate you taking the time to highlight Danny. Providing excellent customer support is a top priority, and it’s wonderful to know that they made a positive difference in your experience.
An employee named Carlos was very helpful and patient. I thought my appt was tomorrow but it was yesterday. I was quite upset when my car wouldn’t start , So Carlos talked me through the process and provided me with a code. He scheduled an appointment for me so I went to Easton but the wrong place. I had to call again and Cory, I think was his name got me through quickly . I finally found the new place and the young lady was nice and got my Interlock calibrated and I paid and was all done
Reply from Guardian Interlock2025-09-26
We’re thrilled to hear that Carlos provided such great support! Recognizing our team members for their hard work is one of the best parts of what we do, and your feedback will absolutely be shared with them.
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James joyce · 1 review · Experienced 2025-09-22 ·
★★★★★
If I could do less stars I would
If I could do less stars I would. Horrible with communication and the instalation messed my car up and they won't reimburse me for money spent to find out it was their device that messed it up
Reply from Guardian Interlock2025-09-22
We’re truly sorry to hear about your experience. This is not the standard of care we strive to provide. A member of our executive management team will be reaching out to you to assist in resolving this matter.
Got the information I needed. Friendly and easily understood
Reply from Guardian Interlock2025-09-12
Every client has different needs and challenges with the interlock process. We train our Guardian Customer Support Experts to be a trusted source of information and appreciate you taking the time to compliment Gabino today. We’ll be sure to pass along your kind words.
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Martin · 2 reviews · Experienced 2025-07-31 ·
★★★★★
Francisco from integrity auto care was…
Francisco from integrity auto care was great install interlock professional with his work and is a great person will help you out and you get a month free to begin with come get his Great customer service
Reply from Guardian Interlock2025-08-20
Thank you for the kind words! We’re so happy your visit to the Las Cruces, NM Guardian shop went so smoothly. I have forwarded your review to our management team in that area to recognize their outstanding service!
Guardian recognizes how difficult and certainly not fun this program can be, however, we are grateful that you chose us to be on this journey with you, and we will be here for you every step of the way.
Tawana was absolutely amazing! She was more help than I got from my attorney!!! She’s easy to talk too, very informative and I had an amazing time just talkin to her!
Reply from Guardian Interlock2025-08-01
Our Guardian Customer Support Experts strive to provide courteous, accurate, and respectful service to all of our clients. Thank you so much for acknowledging Tawana. We will make sure to let them know they are doing a great job!
I scheduled the appointment with Guardian but when I arrived at the shop they had no record of my appointment and hadn't been sent the equipment. Guardian then tried to tell me I needed to take my car (which I'm not legally allowed to drive) to another shop. After refusing to do so, they agreed it would stay at the initial shop. I received no communication after that and had to call to request a status update. At that time, the shop tried to charge me for the installation which was advertised as free to get started. When I called Guardian to help resolve it, I got multiple different answers from more than one person. The first person actually told me, "no" when I asked them to stop interrupting me and let me speak. Poor communication and rude representatives who do not know how their service works and what is being advertised made this a horrible experience.
To be clear - the fault is all on Guardian's end and not the shop's.
Edited 7/25/2025 @ 2:48 PM Mountain - I received a response from Guardian that tried to place the blame on the shop, but also asked that I update my review. Well, here's the update - Asking me to change my review when you're at fault and the service and treatment from your agents is subpar is not helping your case. The review stands and it would be lower if I could give them 0 stars.
Reply from Guardian Interlock2025-07-25
Thank you for taking the time to provide us with this feedback. We have escalated your concerns about our Guardian service location for our Field Management to look into, and someone from our executive management team will reach out to see how we can best assist you during this time.
Marilynn starnes went above and beyond to help me when I called in today. I've never had such great customer service!!!
Reply from Guardian Interlock2025-07-25
Thank you for taking the time to share your experience with Marilynn! They will be pleased to know their exceptional customer service made you feel valued and important to us. This is what Guardian strives to be for our customers, and we are thrilled to hear that Marilynn was able to make you feel this way!
This place set an appointment and the shop they set an appointment with canceled without letting me know. Now I have to start all over with another company
Reply from Guardian Interlock2025-07-18
We apologize for the inconvenience you experienced at your installation appointment. Someone from the Guardian management team is looking into this and will be in contact with you to see how we can best assist you.
Thank you for the kind words! We’re so happy your experience with our Guardian Customer Support Expert, Cristian, went so well. I have forwarded your review to our management team to recognize their outstanding service!
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Oatah Cosa · 5 reviews · Experienced 2025-06-20 ·
★★★★★
It was a Friday and I had just left my…
It was a Friday and I had just left my appointment I had the 3rd device installed dye to the first 2 malfunctioning! I go into work for three hours and I go to blow and the bottom connector just cones right off wires and all! I told the lady that it looked loose which she said was fine! I rushed back up to the shop to get it fixed replaced or whatever and they are closed? It's 435pm sign says 5pm is closing time. I'm not rich and an barely scraping g by in life and an Uber just isn't an option so I don't turn the car off until Saturday. I called the number numerous times and all they could say was sorry. This is unacceptable they need som e one who can take care of This stuff in the off hours! I have to work I have a family to feed and to hear sorry is so irresponsible and ridiculous from company that is supposed to keep the roads safe! I pay $125+ for the service and I keep getting junk! Now the whole bottom half came off cmon now. So now I have to.pay a tow truck to get it there Monday plus I'm careless for.2 days! Guardian needs to do more were talking about a person's livelihood here
Plus I ended up having to.miss work anyways for the cheap defective device they installed this time! Sounds like a lawsuit to.me.
Reply from Guardian Interlock2025-06-24
We’re sorry to hear of your experience and would like the opportunity to investigate this further to see how we can help. Unfortunately, we are unable to identify your account, so we’ve sent you a private message (through Trustpilot) requesting more information. Upon your response, a Guardian management team member will reach out to see how we can best assist you.
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Dennis Lynster · 3 reviews · Experienced 2025-06-13 ·
★★★★★
The local franchise is great - Firmware Updates ruin the device, and make it fail.
The local franchise is great - the issue is with the device programming / firmware. When the device was first installed in December, all was as anticipated. A few months in, I started receiving Errors Codes. The unit would display "Low Battery". I was concerned about parasitic draw from the Guardian System. I went to the local franchise and they replaced the handset. Two weeks ago, coming back form picking up fast food, and, apparently, now that it is warmer, the unit does not recognize that the car has started, (local franchise tech informed me of a threshold voltage being 13.8) So, I mistakenly assumed I had an alternator problem, Two trips to my auto mechanic to find out that the Mercedes running voltage specification is 13.5 volts, and they would not replace an alternator that was working properly. SO now I've spent almost $300 on a battery for this unit. The unit shut downs and reboots requesting a blow - goes to "Start Engine" and never gets to "Drive Safely" before cycling all over as if i just got in the car, a mile down the road. This process sometimes happens three or four times, before I get a "Drive Safely" Graphic. Then there's the other firmware issue - the device no longer 1) displays a box around the Pass Checkmark, 2) No longer chimes when switching to "Drive Safely" 3) Doesn't initiate the internal "knocker" if the radio / ambient noise is too loud and I don't hear the first "blow" chime for a rolling retest like it did in the first thirty days of use.
Reply from Guardian Interlock2025-06-24
We’re sorry to hear you have experienced a difficult time with your Guardian device. We want to make sure you are confident and feel safe when you are on the road. Someone from our executive leadership team will be in touch to see how we can help.
Luis, the tall guy, helped me twice. Both times he delivered excellent service and very friendly! His knowledge was key! I appreciate the legendary 5 star customer service! Thank you, Luis and God bless you!!
Reply from Guardian Interlock2025-06-09
Thank you so much for acknowledging our Longmont, CO shop. Our contractor partners are a huge asset to the Guardian brand. We will make sure to let them know they are doing a great job!
Guardian has been incredibly frustrating and unaccountable from the very beginning.
Genuinely awful experience. From the installation through Guardian, to the customer service to making sure they are complying with the DMV. Absolutely no accountability. Guardian has been without a doubt, the worst part of the DUI process for me. I received different answers every single time I called looking for assistance.
Reply from Guardian Interlock2025-06-05
Thanks for providing this feedback. We are looking into the issues presented here and a Guardian management team member will be in touch to see how we can make your experience better.
