Hi Sarah

I uses TENS with both of my labours. With #1 it was great as it was a distraction. I was 4 cm when I got to the hospital. I had to take it off to get into the bath so I got on the gas. I believe it helped me cos by the time I wanted something stronger than gas I was ready to push.
With #2 the hand controller broke so I couldn't use it as effectively but as this labour was very fast it probably didn't help much.
I'd use it again though as I believe it can't hurt you to try.

Luv Sam