The price is right and it's better than the good old manual pressure reader. I like that it costs about $6 and has a light on the nozzle to help when trying to find a tire in the dark. I think this could be off by 0.5psi since it reads "31.5" but at the pre-inflated "32" set at the Costco tire center. but who cares 0.5 is good enough. although the dough will stand. the time will show.