I bought this because I was tired of waiting in line at the gas station to fill nearly flat tires (25psi/44). This pump is compact and appears to be well built. It has a clear and easy to read backlit display on the front and connects to my tires easily and securely. However, if you want to plug it into an outlet, the included DC adapter has a very short cord (maybe 3ft). It's fine as most people keep a spare extension cord in their garage. More importantly, the pump couldn't even inflate a tire from 25psi to 40psi without stopping. I'm assuming it's a safety measure to prevent overheating (which is definitely better than just melting), but that's disappointing. I waited a few minutes as the manual suggested, but it didn't cool down much and turned off again after a few seconds.