I am not completely sure yet.
I've heard that it is a very visually innovative game, and that interests me a lot, but it doesn't have some of that main Kirby elements, such as inhaling and floating. In fact, the game wasn't originally even going to be a Kirby game.
I've also heard that it isn't challenging at all, according to IGN, you can't even die or get a "Game Over" screen. This arrised some more doubts from me, as I like a challenge in games and Kirby games usually have some nice puzzles.
I'll have to hear some more opinions from people who have it before I make my decision.