My wife couldn't believe the number of times I smiled and said what a great purchase this is. I have a large 15 gallon air compressor and have had several portable tire pumps over the years. I have repaired cars myself for many years, changed oil, changed tires. I know a good product when I see it. I have a third flat tire due to a construction site in our area. They all spend weeks with a nail or screwing in a tire before they hit the ground. The third has not yet been repaired due to illness, vacation and our restricted driving style. Today I unpacked it from the trunk and showed my wife how to use it as the tire was shrinking. I did the first tire, then she did the other three tires on her own to get them all to the desired pressure. This took the tire from 12.5psi to 32psi in less than 2 minutes. The remainder increased by less than 1 minute each. Because it's digital and can be set to the correct pressure, it will automatically shut off once the desired pressure is reached. Also, he knows you're losing about 1 1/2 psi when you disconnect the hose, so he's upping your settings. I was very happy with the noise level, much less than others I've had. After inflating all four tires, it wasn't hot. Excellent quality bag. Not so tiny that you rip it apart and try to get it all back. I highly recommend it, I'm still smiling at its quality and performance.