I have the bottom of the range Garmin (200), which is perfect as a computer that tells me how fast I'm going, how far I've gone and what my average speed is, which are the only things I really want to see on a ride. And when I get home, I can download the ride to the computer and see how steep the hills were. I have a mount on each bike, so I just move the Garmin from bike to bike, depending on which one I'm riding. It works for me.

But having said that I just acquired a new phone (Nexus 5), so I could try the Android route for shorter rides. But it would mean three mounting systems for three bikes, at a time when I am trying hard not to spend money. I think I'll stick with the Garmin.