I had a Contour Roam with GPS and stuff for the trip to Romania last year. We never got it to work properly; the first one was DOA, the second (both purchased from Amazon) did fail on us dozens of times by shutting down after a few seconds of recording, more often than not unnoticed (I cannot constantly listen for some odd beep when I´m riding). Replacing and formatting cards, updating software and firmware and even the secret dances did not help long. When it worked, it got excellent results, but I expect reliability for this amount of dough.
I finally gave up after it failed on us again during this years´ trip to the UK and sent it back to Amazon. Man am I happy now that I asked for a refund instead of a product replacement.
If I ever go back to making roadmovies, it will be a GoPro, whether I look like a Teletubby with one on my helmet or not.