Had mine for about 20 hours and it went to a 90 degree bank angle on startup. No way to reset or cage it. Removed it and sent it back to TruTrak for warranty service. It?s worked flawlessly since then. Currently 280 hours on the aircraft. I use it as a standby attitude indicator. Primary is a Dynon FightDek 180. GPS source for heading input is from an iFly720. Any attitude indicator can fail. IMHO with over 22k hours of flying, cross reference all instruments. Attitude indicators fail, solid state or vacuum, that?s why we practice and are trained for no gyro approaches. In a pinch, the iFly has a basic attitude indicator too.