I wear it while cycling, 50-90 minute sessions, no problems at all. I thought I might have some problems as I don't wear it super tight (can squeeze pinky beneath the band on bottom of the wrist,) but, no. It reads fine, same consistency as the sport band. This is cycling, though, not running. I guess I hit enough bumpy garbage roads to cause it to shake around, but, it's not constantly bouncing like on a runner. Anyway, point is, it seems to do just fine and, of course, any concern over sweat or whatnot is a non-issue. It's stainless steel. A rinse and a wipe after a workout and you're set. Wear it in the shower, or whatever is easy.
I am glad it works fine, because, honestly, I would not want to change this band every day multiple times. It's "easy" compared to regular watch bands, but, it's still a big enough of a pain that doing it 2 times every day I think it would guarantee a mistake within a few months and a lost watch, or just a broken attachment mechanism.