My hospital hires them for free, so at that cost, why wouldn't I try. When I picked it up last week, they put it on to show me where the pads go, and then let me have a try at the dials. I was pleasantly surprised at the sensation. Instead of a jolt of electricity, it felt like a nice pulsating massage.
As the others, I plan to use it in early labour. If I like it, I'll keep it on, if not, it's easy to remove and hop in the pool/tub!