I'm making a little game that uses copious amounts of Spine. I made a trailer about a week ago which you can see below:
The player, the monster, and all the HUD effects were done with Spine. I also have an animated menu which uses Spine as well. You can see it in this tweet:
I really, really like Spine. It's so easy to use, I basically turn to it any time I need something to do more than slide across the screen.