Bests & Worsts Reviews from Amazon

Very simple to use, effective, user-friendly design. If you follow the directions, the thing works. Reading some of the reviews, I don't think people are following the very simple directions. The pump should be in the OFF (O) position when you plug it in to your car power outlet. But know that the flashlight will illuminate. You want this, but you don't want to hear any noise. If you do, then it's on, and that's not good. Then, attach the tube to the tire. The display will then show the current air pressure (also note that they are four different units, so if you are using psi, make sure it's set to psi by pressing the R until you get to the right unit of measure. That's no mentioned in the directions). Next press the + or - buttons to get to your desired inflation. WAIT for the display to STOP BLINKING (this is not in the directions, and could be tripping people up).Then turn the switch ON (I). And let it do its thing. The machine will turn off when the desire air pressure is reached. Unhook the tube from the tire, and you're done.