Is Theatrhythm Final Fantasy worth it?

I keep seeing it around when I'm out shopping and I'm curious if it's worth shelling out the money to get. I know one of my friends over on Tumblr seemed to be really into it, but I'm not so sure. I don't think I've ever played a game quite like it before, however I know in the past I haven't been a big fan of Final Fantasy spin off games like Dissidia.