Originally Posted by
TandemGeek
I selected a Polar S720i HRM for Debbie with wireless speed / cadence sensors about 5 years back. It works just fine but needs to go back to Polar about every 2.3 years or so for a new battery / tune-up. In fact, that's where it is right now. About $12.50 last time around and two weeks down time.
+1 on the 720i works great, you can use it on more tha 1 bike, plus you can download your data at the end of the ride.