I own one of these, so I'm sad to see that the service is being stopped. I initially got it just for sleep tracking, since it was the best in that category at the time. But after I got it, I also started wearing it during the day because it was just a damn decent watch; that is, it was good at telling the time. The LCD display was large and clear, and the band was very comfortable. It's actually one of the best and watches I've ever owned, just as a watch. I would charge it for a few minutes each day when I took a shower, and this was enough to top up the battery.
I also had a minor knee surgery in December, and I found that it was very useful for tracking my steps during my recovery. Finally, when they updated it to receive notifications, I was surprised at how convenient it was to get text messages on my watch.
So all in all, it was a great piece of hardware and I'm sad to see it go.