I used one last time, (I think Rubbermaid should use my birth pictures for a commercial!!!) just kidding! It was nice and deep and Im not a small mama, I have supported 3 other births in it too, and the mamas all liked it, you can use a towel or a bath pillow to sit on if its too hard, but I like the hard fiberglass to push against and it not give. Deep is important! to get the physiologic change in your body (lower bp, ect) you must be chest deep/buyount in the water. I will try to find a pic and some more info on it, Waterbirth international is the mother sight for info on water birth.