We have used them for over 10 years (replaced them a couple of times) and they work great. The only time we cleat them off is if we are in a hard blow, (20+kts) but even then I don't think they would ever let go if you put several wraps on them. They are a poor mans self-tailer, but I'd never go without them again with standard winches. We keep thinking that the original winches (78') will fall apart so we can get new ST's, but they keep going, and going.... My father tried to use them on his 1970 Contest 30, but the top lip of the winch was too thick, most standard winches work though. Good luck.
SV Laurie Anne
1988 Brewer 40 Pilothouse