The Microsoft Band has a built-in sleep tracker. I've never used one before, so I was looking forward to testing it out for the first time. You'll need to activate it before you sleep and then stop the monitoring when you wake up. Here's my experience with it last night.

First of all, I had to disable Watch Mode at night even before bed. It was nice to have during the day, but it was just too bright for me at night. Microsoft should add a setting to change its color or automatically disable the feature at night. Still, if you use it, it does shut off when entering Sleep Mode, so that is meeting us half way. When in Sleep Mode, the Band's screen is completely off, which is smart.