Bought for $40 from Menards. It was very quiet, but ran VERY slowly (engine RPM) and vibrated while bouncing around. It is stated that the average tire is full in 6 minutes (by Platt?). He died at over 5psi in each of my four tires. He ran to his death in barely 6 minutes. I let it cool for 15-20 minutes and could barely finish. 30psi (additional due to long hose and loss of pressure when unscrewing the hose) for four medium tires = equal to or less than a regular tire at 35psi. I'm sending back this expensive junk.