I had a good feeling about it since Yoshi-P is involved, but the demo still impressed me anyway. Fun to play, just enough story to get me hooked, and actually quite a meatier demo than I was expecting. I thought the Eikonic Challenge would just be a bit of combat demo to follow the story demo, but then it turned out to be even more story! And I actually quite like the Devil May Cry-style gameplay, even though I never played it (but I did play Bayonetta, which is close enough). I've always been a staunch turn-based RPG fan but some of these recent FF games have been pleasantly surprising me. Stranger of Paradise came out of left field for me, for example, and I thought it was stupid at first, but I ended up really enjoying it.
Can't wait for June 22!