Bought this purely as a way to record myself in the local pool for self video coaching, in place of an old camcorder and flexible u/w housing, and it worked perfectly.
Simplicity in itself to use (once you have worked out how to open the back for access to the sockets, etc).
Its auto white balance totally compensated for the blue of the water (unlike the old camera), and while the fisheye effect is really obvious used out of water, looking through the flat window of the matching u/w housing narrows the field of view appreciably and makes everything look much more normal.
That case and the suction cup holder made it a great tool for my chosen task.
Subsequently I have used the rotating flat surface holder to attach it to a long rod to allow me to inspect my roof and gutters from the upstairs windows.
Designed for recording action sports, yet with so many other potential uses.