Definitely well worth it!
Took it snorkelling in Egypt with a float like http://bit.ly/16xNSKa. Wrapped round my wrist, came out very well. Have yet had chance to upload to YouTube yet though. Need to edit the footage together, but my computer can't really handle the 1080p 60fps footage.
This is some unedited footage I took when going gokarting:
1080p 60fps - standard helmet mount.
Kevs's 33rd Birthday - Run 1 - YouTube
Si