Ive had two bike cams and was disappointed with both.
Vivtar 785 hd from WallMart was given as a gift. Image quality was so-so, and it stopped working after less than eight hours of recording.
Contour Roam. I received delivery of this the same day it was announced that the doores of Contour HQ had been shuttered. I used it and liked the results better, but started having reliability issues with it, and it still functions intermittently. Now that Contour is up and running again, I have sent inquiries about service, but get no response.
I have looked at several and have narrowed it down to;
JVC - Adixxion GCXA1BUS. This seems to give a lot of bang for the buck. I like the form factor, and the fact that a big old outfit like JVC is not likely to fold out from under me. One feature I would like is the ability to run it while connected to an external battery extender. I believe this camera has that capability. I would really like to record long rides, then edit them down for highlights. Really long rides like centuries I would carry a spare sd card.
Sony Steady Shot. More expensive than the JVC, but from the reviews better image quality. Again from a company that is likely to stick around.
Drift Ghost S. The priciest of them, but from my research an awesome camera. Aside from the price, I an a bit nervous about laying down that kind of coin for a product from a company that may do a "Contour" on me.
I have read a bunch of reviews on a lot of cameras and I have learned one thing from the negative reviews. Reliability is the biggest cause of negative reviews, and they all get some. Most of these are good products, but occasionally a bad one makes it through QC. It has become pretty important for me to go with one from a company I know will be around to support it.
Thanks for your input.