Quality seemed pretty good when I opened the package, but the inflation air clamp leaks badly when not axially aligned with the valve stem of the tire you are trying to inflate to check and/or increase (inflate). I compared the digital PSI reading from this battery powered gauge to the PSI reading I got from my trusty analog dial gauge (which is usually very accurate) and it (this digital gauge) read 2-3 PSI higher consistently. . Also, the instructions for this product weren't very good (poor, pretty crap) so you'd better have a good idea of what looks normal and what doesn't when assembling and using this product. Build quality and materials seem good right off the bat, but we'll have to wait and see as far as durability goes.