I spent two weeks studying Toon Boom Harmony.
I made this as an exercise and I'm pleased with the result.
Toon Boom is great.
It's a bit more traditionally based in terms of tools and animation.
I like their layer based system and color pallets.
But the change from Flash is a bit too drastic for me.
Especially since I've mastered Flash and know a lot of shortcuts.
I'll probably play around with Toon Boom some more in the near future.