Good selection of songs, glad they're bringing back licensed songs. Game is easy to play. Really, it's just tapping to the beat of the arrows on-screen, just like in the arcade.
I also noticed that Rick Astley's on there. We all know the YouTube joke that even Google themselves had done to all of us.
Iffy, why? Depends on what the person inside of you are. If you're a tech person that's afraid to dance in public, I'd stick to the iPhone app, Dance Dance Revolution S.