Chest is best
This is my favorite mount for skiing, I feel it gives the best perspective to the viewr and it's hardly noticeable and the shots seem to come out the smoothest. For easy POV skiing this is the way to go, and it won't look like your 10 ft tall when it's mounted on your head. I also anticipate trying this mount biking, but the angle may be to low. All in all a must have for any go pro user.