Wireless cyclo-computer is a fool-proof way to watch all the data of your ride in real-time. Montage is super easy and its functions will inform you about how hard you ride. And maybe that you should ride harder.
If you want to keep track of as much data as possible, the SmartCadence is one you can't miss. Make sure your cadence is on the right speed and train your body the way you want it. Keep control over all the aspects of your ride. The only thing you have to do is keep those legs rolling!