Totally unreliable via coppering process: move away!
I had a first batch of 10 basic 2-layer PCBS fabricated by PCBgogo, having 16mil vias (so way far from small and complex!!): after a while the devices built with those PCBs started to become unreliable and reading bad ADC values. I firstly crushed my head around the smd soldering and mostly on the firmware because I would give for granted that the PCBs would be ok... But after more than a month I discovered that the vias under the microcontroller were basically interrupted. The fact that this happened after the device was operating properly for a while (6mo!!), leads to the obvious conclusion that right after production, the vias were simply loaded with low or no copper, enough to barely pass electrical tests. The current flowing through those vias is close to zero because they are just ADC inputs to a pic microcontroller, so that certainly wasn't the cause. I therefore started to test out the remaining PCBs from the batch and 6 out of 10 were having random issues on the same vias... and whom can tell if the remaining 4 "good ones" will develop issues later in production!!! I can't express badly enough my anger in making such a discovery and thinking about all the time wasted debugging this issue, and the pain and trouble had with my customers. CONTACTING SUPPORT WAS USELESS: they are just push-backers and only bother in fulfilling thousands of orders with low quality products and move on to the next one!! You as a single person count 0 to PCBgogo!!!! If you need a few cheap PCBs to quickly prototype, but are willing to just bodge & hack whatever S*** happens instead of focusing on your final product, then go ahead with PCBgogo, it's a cheap option at least... and it's your time that is wasted, and your call to value it! If you need something as little as close to serious, then I STRONGLY RECOMMEND RUNNING AWAY because there's NO RELIABILITY in their via process, and you will be driven crazy in making things work and even worse if you have customers to which you are providing the final product. PCBgogo, SHAME on your quality and lack of support!!