A friend of mine used the TNT bottle opener and it was a PITA to setup at first. Its got a little clutch in there and it took a while to get it setup to where it would open the bottle all the way without slipping, but once the bottle was open, the clutch would break loose and not stop the motor. He eventually got it dialed in and it worked ok, it was a bit flaky, and sometimes would need a re-adjustment after removing for a bottle fill.