I have now gigged two different guitars with Type 1 Tronicals for over three years with no failures. I have had to recalibrate one set twice in that time, but the one on my SGJ has been true since initial setup. It is my belief that most "failures" were on the part of users who failed to read and/or heed the user manual. I know, more than one paragraph, it's too much commitment for most guitarists. According to a tech at Tronical most of the trouble they've seen is from guitarists galling the gears by using a tuner crank to wind strings instead of just pushing the up button.