Very poorly built. The pressure release button seems untied and almost ready to fall right out of the box. When the pressure gauge is pressed against the tire studs, air escapes between them during the measurement. Maybe adding an o-ring or something would help. However, it should work right away, right? Overall, the thing looks great, but that's all it needs. My 18 year old Accugage feels MUCH tighter and more precise. This differs by about 3 psi (above). I compared its accuracy to two other mechanical gauges and my F30's TPMS. I wouldn't return the gauge but I won't use it often. It will only stay with the spare tire for emergencies. For real service I will continue to use my old shabby but reliable Accugage. Good luck with your shopping, and if you found this review helpful, please click 'helpful' so others don't waste their time reading it and making the right decision for them. .