My SKS AirGun inflator has always worked flawlessly. I don't put it to that much use though since I don't get that many flats. I think since I've had it (5 years), I can count the number of times I've used it on one hand and still have fingers with which to pick my nose. I view CO2 as a temporary fix anyhow as it leaks out of your tubes faster. For me, it's quick and convenient and gets me back on the road to go hunt down an air pump. I also keep a Presta-Schrader adapter with me.