I had smart tire gauges. This is the first portable tire inflation pump. I have to say that this is the easiest to use. I like the auto shut off feature when tire pressure is reached. I love this instrument very much. I inflated 8 car tires, 4 motorcycle tires and 8 bicycle tires. This is only a loss of one bar on the energy meter. Each inflation was very accurate and much faster than I expected from a portable device. I've used devices that plug into a cigarette lighter and it's much faster. I also like to have a backup of the cable in case the battery dies.