It's light and does the job well. It connects well to the valve and is pretty quick. The packaging says plus or minus 3 psi, which is a lot. Mine inflates about a psi too much. I would, and do, recommend a good, accurate pressure gauge for use with this unit. I was happy with the slime which has the advantage of not releasing air when checking the pressure. Both purchases - this inflator and the tire pressure gauge - are the result of many hours of reading reviews.