I have used quite many solutions for puncture fixing and inflating in the middle of nowhere and I can make out if a pump is good nor not. This one, ive used a few times and found satisfactory. Inflates a 215/75/15 from close to no pressure to 30 psi in less than 10 min. which is not bad. I guess a regular car or bike tire will get full in around 5 min. Not getting much hot like ive see with some other pumps. Built quality is good. Less noisy. No vibration. You can leave it on the ground and need to observe only the gauge which i think doesnt have much error (did calibrate with another gauge and found almost same). Nozzle seems good quality, able to connect and disconnect with almost zero air leakage.