Haven't had an epidoodle with either of my pregnancies as it seems to prolongs labour. In my experience you respond to what your body is telling you, I was only 7cm last time and felt urge to push, so i pushed. If i had had one i don't think i could have responded to what my body was telling me as you can't feel anything. I managed on nothing first time and tens machine 2nd time and each labour was less than 3 hours from start to finish (induced). Alex weighed in at 8lb 6 and cameron 6lb 1.
Also please note i wasn't trying to be brave or clever, concentrating on my breathing helped loads.