No problems with this sensor, it seems to work fine. I bought a similar Vondior sensor at the same time and found that it was dirty on the inside with some kind of flaky dirt (after cleaning it worked fine), but the TireTek was clean on the inside. Not that TireTek is necessarily immune to this - the two gauges are identical down to the color of the dial (even the internals are the same), and I'm pretty sure they came off the same dirty assembly line in China. So I suggest unscrewing the tip and looking for dirt if you're so inclined. After removing the tip, remove the aluminum valve seat, rubber washer, clear plastic washer and spring. That's when I found the junk in mine. A very silly bug in TireTek (but not Vondior) is the luminous dial feature. I don't usually check my tires in the pitch dark, so it's not a problem for me. but while the dial on both versions glows brightly after exposure to light, only Vondior made sure the hand glows too! The TireTek arrow does not glow and is not visible in the dark. Look at the picture. So, until you check your tires in a darkroom with the lights off, TireTek seems like a decent tool. I can't vouch for its durability or accuracy (yet), but TireTek and Vondior agree with each other (within 1psi). So that's probably accurate enough. However, I still shake my head at the non-luminous pointer.