Just finished it, very satisfied! I've never played a game quite like it and even with the very limited powers they give you in the demo there's a astounding amount of depth to the scoring and combat. I'm pretty sure when the full game ships we'll have a ton of different power-up options and unite move sets.
Going to be a Day 1 for me!
Yeah it's amazing how much you have to react to enemies and be really proactive about executing combos the right way. It's so satisfying when everything comes together perfectly. Kamiya knows how to execute an action game, this is undeniable now, considering how much of a departure this seems from his previous action games. He makes it work!