So far so good. I know I'm getting correct feedback. Few things I'm seeing . The rowing "activity " is the one I use and will use most. Thing is completely off and wrong about stroke rates etc... Also when I manually over ride my max HR the graph doesn't update to my manually entered number of 185 beats per minute. It seems to stay defaulted to what biostrap thinks my max is of 173. Irritating since I know my max HR is 185. I have been there more than a couple of times. Live to get that sorted. The new style strap is way better than the 2 that come as extras. The tail of the band never stayed centered. The new design is way better.. Overall I like it and believe I'm getting proper feedback.