I have the Comeo Breaker packs so I can't play Cinder yet, but he was released yesterday for Ultra Combo Edition. What is your first impression of Cinder?

He's fun so far! I actually think he's a pretty difficult character to figure out... lots of interesting uses for Trailblazer, he has some good pressure with Fission and shadow Inferno, and his Burnout enders are cool, although they aren't nearly as good as some people think they are.
But in general, I think it will take a lot longer to unlock the true potential of Cinder than most characters in the game. He's good at a lot of things but not amazing at any of them (except doing chip damage and frame traps). His neutral game will take many weeks before anyone can figure it out, I think.