At first I gave this product a positive review because its features are really great, but the quality control is a big issue. The first one that was sent to me had an issue with a pressure sensor that shut off the compressor very quickly before it reached the desired PSI setting. I replaced it and the second one initially worked as expected, but now after a few weeks of use it won't charge. I can plug it into a charger and it looks like it's charging, but after a few hours of charging the battery is at 1 bar as soon as I unplug it and is completely drained in less than a minute. The concept is great but the quality of the product doesn't match the price.