I feel like they are a waste of money, I run around like a nut on stage and my bass, once every blue moon will fall off. Even if it does fall off, whats the big deal?
What I use now is a combination of the Boss od-1 distortion and the boss bass eq pedal. Before the od-1 I had a pro co rat distortion pedal, but it died. Eventually I'll get around to fixing it...