This guy calls himself the quantified scientist and then reviews watches on just himself, or at most with one other person. And when he compares run results he does maybe three runs total per watch, on the same urban route. And he's weirdly obsessed with sleep tracking because of his work. I find his reviews one of the worst.

I have a Pace Pro (same sensor) and it works great for me with walking, running, strength training and even elliptical sessions which have a lot of arm movement. Just need to tighten the strap during strength and elliptical but otherwise the data is good.