Without a doubt the doula and my wife's friends that took bradley courses were an influence to not get an epidural. But her friends were shocked that she managed to go 28 hours in labor and 5 hours on petocin without an epidural. Even she doesn't understand how she managed now.
I'm not convinced in makes sense, but I do understand the arguments of both sides. It's a lot of unnecessary pain that creates a good job for the doula. But there are complications of an epidural, not least of all having a big needle stuck in your back and not being able to push as effectively or even being able to go to the bathroom.
YMMV I suppose...Personally I think for a 2 hour labor like my wife's friend in CLE had last week it makes sense to go natural, but for a long labor, especially with petocin, it's a little extreme to not get an epidural.