I started inserting them at 36 weeks. We use a bit of lube because it can be tricky, they are slippery little buggers to hold on to apparently. lol

I don't know if I can reassure you that they will help you to not go overdue, I've done it 2 times previously and DD2 was 12 days over and DD3 was 11 days over. I think some people are just slow cookers and baby comes when its ready to be born, not if our cervix is ready to expel it LOL

RLT will help with your contractions more than EPO as well I believe. As a uterine tonic it helps prepare your uterus for more effective contractions - so its said to be a shorter, more efficient labour (dunno about pain free though!)