Best yet

This is the best HRM yet so far in the past 10 yrs. What have I used? :Nashbar xs2, Garmin xs2,(worst most expensive), polar, (borrowed, broke cost me money to fix), Ironman xs2. Suunto, (expensive, took it back to REI). Wahoo works well with iphone except when I got my new SE had difficulty pairing and had to reset everything losing past data. otherwise excellent!

A.Kestrel about Wahoo