Just so people know what the "session" is.
This model does not have a display on rear of it - so when you are filming you don't see the captured video/image. This doesn't tend to be a problem for action footage because it has such a wide angle, but if you are looking for a more general purpose cam that supports zooming in while filming, etc. then have a look at other models.
I've taken lots of good footage with this cam (yes it's waterproof), but please do your homework before offering me $$ to make sure this model is right for you.