This has changed the way Im able to approach cycling indoors in winter. Its also deepened my passion for cycling. My only knock so far is that the sensors dont always synch up immediately. I sometimes have to pedal backwards to get the cadence sensor recognized and frequently have to disable the heart rate sensor for a few seconds before enabling it so the system recognizes it. Overall, Im very satisfied.
This new 520 model is great.I prefer the buttons to a touch screen and the new mapping is very nice.
Battery life seems a better also.
I wish Garmin would introduce an easy way to create and load custom maps though.