Very easy to use. Features a digital gauge that tells you what pressure your tire currently has. You set it to the pressure you want, press start, and it turns off when it reaches that pressure. It also shows that the tire is inflated in 0.5 increments. Use it to equalize the pressure in all four tires. Each hoop was dropped about 5 pounds. It was fast, only around 30 seconds per tire, and it's not noisy when running. It has a low rumble at best. I would definitely recommend this to other people.