My work was giving out Microsoft Bands for a fitness tracking thing. I love gadgets, so yeah, I'll take one. It's really kind of a cross between a fitness tracker and a smart watch.
Yes, it's utterly useless in terms of swimming or even manually entering swimming activity. However, I did get a little use out my fitness tracker.
Confirmed, yes, I sleep light. Also got my resting heart rate.
Which at my age and weight isn't supposed to happen. That's for athletes.