If you like cute, bizarre, and musical, look no further.
That's about it though. The "plot" is incredibly vapid and contrived.
The main cast is quite stereotypical, but enjoyable nonetheless.
The music is VERY anime (which may or may not be a good thing).
It's also worth noting that performances are animated in an odd 3D style.
If idols saving the world with the power of music sounds good to you, give it a shot.