Originally Posted by PeteHski

Have you run it back-to-back with a chest strap to confirm it is actually good, consistent data? I'm not trying to disagree. In fact I'm looking at buying something like this and wondering what expectations I can have. I'm not looking to replace my Polar sensor because I think that's still the gold standard of optical sensors, but there are times when I would prefer to just wear a watch and my Fitbit Charge 3 isn't cutting it. Mountain biking being one of them.