I used on one my FCR 1 and ended up taking it off after a couple of seasons of riding with in and not having it work consistantly. For me it was a waste of $$. I believe the problem was that it would not stay lined up. Have considered putting it on my Vita just because I am a gadget girl, but have not been motivated to try it again. I do love the FlightDeck on my Ruby, just wish in would up load the data like my Garmin 305. I end up using both the FlightDeck and the Garmin. Flightdeck for candance and other on the ride info and the Garmin for the stats I keep.