It was FANTASTIC. It was the only thing I needed for my 9lb delivery. I know different things work for different people, but I was dreading labour - I am a wuss with pain or so I thought, but the tens was brilliant, I used the babycare elle one. My labour started at 9pm ish and I popped it on, when to the hospital at 10.30 ish and was already 8cm dilated, then used it all the way through to the end at about 2.20! It was a great distraction and really helped. I didn't even turn it up full whack as was waiting - till it got really painful lol.
Get one!!