This exceeds my expectations so much. I clean my hands and change the engine oil in my car and my wife's car, change tires, service other fluids, and do other minor maintenance and repairs. I inflated the tire manually as my spare electric mud pump filled 1psi in 5 minutes. I deflated the tire to 27psi and raised it to 32.5psi and it took 30 seconds! It was loud but light and fast. The pressure was about 1 psi higher, so I bled some air. I also tested the other tire and also got 1 psi more. So. Maybe I'll set it 1psi lower than I want it to be from now on. But it works great. No regret!