That LCD screen will eat up batteries in a jiffy. make sure you use it to set up the shot then turn it off for recording, or for playback enjoyment. it's such a wide angle I figure it'll grab "everything" in front of it.
I picked up a battery bac-pac and will probably get one more so I can alternately charge/use them. they ain't cheap though.
I love mine. the seat post mount fits perfectly on my Gamiviti rack and I mount it so I can turn it on/off with my left hand out the window.