Nadine it's not electric shocks! More like impulses that kind of feels like pins and needles and it's fully adjustable for you comfort level. Light for mild contractions and you crank it up as you need to. If you have it on high straight away then it might feel a bit too full on but if you end up using one you'll be surprised at how much you can tolerate the highest setting in the peak of a contraction and it can be comforting!

I found it helpful, especially for my first and second labours. My third labour came on very fast (2 hours in total) and it didn't really help much due to the immediate intensity so I'm undecided whether to use one again. I have a feeling I will though