I just picked up this gauge after a friend and I went off-roading and when we went to air back up none of our gauges agreed with each other. The gauge is fairly easy to use. It just took me a couple tries to get used to positioning it compared to the stick gauges I'm used to using.I think a big plus for this gauge is accuracy. It's reading approx. 1.5 psi lower than my stick gauge did. Now, after that incident with the gauges that we went through my friend checked his gauges against the calibrated professional level gauge that one of his techs uses in the shop that is accurate to within .1 psi. When I compared this new Auto Meter gauge to one of his that he'd tested, we figured out the gauge is reading .2 psi lower than the calibrated professional gauge.