I am not a fan of them, nor is Rhea my teacher.

You basically have to sit there waiting for each contraction and press them just before it hits, so I think it focuses on the pain too much, also if you want to get into the water you have to put them on and off all the time. Also there is no proof of it's safety. Another thing is that it usually is most effective for those who have back labour (posterior bub etc) but there are lots of things which I don't think make it ideal for labour. Some people do find it helps them, but many don't too. Rhea also made a very good point about it which has slipped my mind, will have to ask her to remind me. I think it might be something to do with needed to start doing it in early labour, so the energy and focus you give to it in early labour may only draw out and stall that labour. I would imagine the anxiety with each contraction coming would also add to it. Will find out to be sure.

Just another perspective, you have to do what works for you.