Not sure about others, but I do get up in the middle of night every so often to use the bathroom. It's annoying that Versa sleep tracking (I'm fortunate in that it works for me more than it does not judging from complaints here) can't account for brief interruption (<3 min several steps to bathroom) and then resume. My Charge 2 use to do that (you see the red line for 2-3 min) and then it resumes once you get back to sleep so you can track the whole night, not just 1-2 hrs! Surely they can import the same algorithm from one watch to another???