I borrowed one of these from work for the weekend. Since we were meeting Dave at the spa today I decided to put it through it's paces there. It's certainly watertight and great fun for just over £80.
The video quality is good but it's not a great stills camera above water. It isn't too bad when you get under the water though.
After that it was home for more study. Great start to the day though and the first time I've done three days in a row at the spa in ages.