Anyone doing or have done a waterbirth?

I've had two kids in hospital with epidurals. My ob is also over the birth center even tho the midwives and nurses attend unless there is a complication. I talked to him about switching to have a waterbirth and my doctor is all up for it so next month's appointment will be with the midwives at the center. I'm just over 20 weeks, any one else doing a water or natural birth? Any stories from anyone who has done it in the past? I'm excited I've had bad experiences in the hospital both times even tho labors and deliveries were extremely easy. I almost didn't make it to the hospital last time and the nurse refused to believe she was actually coming out and by the time she looked her head was partway out and the cord around her neck in a knot. Definatly looking forward to this new experiance!