Have always been curious to try them and also, have thought they'd be useful to have to hand should a client ask if I have them. Finally remembered to ask for some on last clinic visit.
To be honest I'm not keen - tried with a client I've seen before several times and whom I can talk to very easily and openly (but who is also incredibly safety conscious). He found the sensation 'weird' but would have presevered if I'd been getting something out of it. Now I don't want to appear hypocritical as I only offer OW, but I couldn't relax enough to be able to tell - I had to concentrate too much on keeping the blooming thing in place. Or perhaps that should be the man's duty??