Thought I read somewhere that the Replay XD is water resistant not waterproof as in you can splash it but not take it underwater. Someone said it comes out of the box set up in a really low quality video mode and you have to sort through the menu's to put it in high quality / high bit rate mode. There are some video on youtube, I'd use a real camcorder to film my adventures and only one of these as a second POV unique angle type camera
, with the go pro at lest you can stick it on the end of a pole and submerge it under water (come here shark), I do like the form factor of this camera
better tho but I would prob buy a hd go pro.