I had a water birth 3 weeks ago with my daughter and it was AWESOME.

I had a second degree tear with my first and not even a graze with the water birth.

Mine was through Belmont Birthing Service - interestingly, I was booked into Hornsby Hospital first and one of my turn offs was their quick categorising into "high risk" and therefore you'll not be able to water birth. Next is that there are no guarantees since the MW attending you MUST be certified to do water births and not all are......

So for me I went with BBS because ALL MW's are certified and you are guaranteed one in circumstances where a hospital birth won't allow it.