The product seems very well made
The product seems very well made. It charges quickly and is fairly intuitive to use. The number one reason we bought this was for a CPAP machine. If the power goes out, we needed this to run the machine. Most people thought it should last a few nights on one charge. It does not, but it did last the whole night. It was 18% left in the morning. We are still getting used to the machine, so it's hard to tell if that is normal or not...but if your CPAP runs a heater to provide moisture, people have said it uses more power that way. I am guessing that is true. But it does serve it's main purpose...it kept the CPAP running all night.