I have a Fenix 5 that I use for running. I've used it occasionally on the bike but I like to be able to look down and not have to take my hands off the bars so much prefer a dedicated bike computer. I've seen dropouts in power sensor on the watch as well whereas I never see dropouts on the 520. The wrist HRM is a novelty but not very accurate so I wear a strap if I want to log my HR. Recommend a bike computer like a Garmin 520.