I've only had experience with one in particular. I tried the Montana Black Gold Trap Door drop-away rest on my RazorTec and my SuperTec. I'm not sure if you're familiar with it, but it doesn't work off cables or ropes, it works off of the inertia created when you fire the bow. It was terrible, I couldn't get it tuned right it's a hassle to use and the arrow will not stay on the rest at much of a tilt of the bow. You have to calibrate the angle of the flipper first, but you can't do that until you calibrate the tension required to make the rest fall, but you can't do that accurately until the angle is calibrated. In other words it's near impossible to tune. Before every shot you have to remember to cock the rest first, which gets to be a hassle and it does not work in cold weather. At least mine didn't, but it didn't always work in the summer time. Maybe I had a bad apple, but I wouldn't recommend it to anyone, even my worst enemy.

On further thought, I've been much happier with my Bodoodle ProLite and I'd recommend it to anyone. I think I'm going to give that GKF Golden Premier a shot pretty soon.