I've used a rh pantin off and on for several years. A great trick It's nice for is if you're hip thrusting w/ vt or distel, u can just kick your feet out to tend your slack instead of stopping to tend slack out if you reef the line hand over hand like a lot of guys do. I spliced up an extension for my rope bridge tho, so my system no longer generates slack during an ascent. The pantin is Great for srt, and my pantin will kick right off like others have said. If youre new to using it, try to remember to keep your upper body more vertical with your climb line, and keep your foot parallel with the ground, and your shin in a vertical line. That will help the rope glide thru it easier, and prevent it from slipping out.