I have the Garmin 400t and love it. I have been using it on my bike in the trip odometer mode and it works great. I do not have the bike accesories for it. I am going to get a dedicated bike computer and pull the 400t off the bike. I got the 400t for hunting. I just got back from elk hunting and the 400t was a pure joy to work with. It locks on the satilites in seconds. I even get signal indoors at times. Very easy to use.