I bought the P150 for myself about 2 weeks ago and have taken it on two dives.
I was a little sceptical, but the quality of the photo's I've taken so far have been pretty amazing (taking into acount that it isn't an SLR). I also, don't have any external strobes or light sources yet, so things will only get better...
If you're interested in seeing some of the pictures, let me know and I'll put them up on my website...