Well, I picked up the game today, after EB finally got it in-stock. I'm enjoying it thus far, but I have to say, it is one of the most difficult games to wrap your mind around. The learning curve is definitely steep. I failed the third practice round, for Pete's sake!
But I am noticing that if I practice a song over and over, I'm memorizing certain parts and am able to pull off combos over time. I've played a little piano in the past, and it's somewhat similar, but often too similar. The black keys are too far from the white ones to make combos smooth like playing on a piano.
Anyway, one thing that irks me about the US version thus far: None of the songs feature previews from the menu. You actually have to play a song before you hear any of it. I much prefer DDR's previews from the menu screen.
And finally, I despise the fact that they included a Britney Spears song - "Toxic." Can't stand her music. Oddly, she's not listed as the artist, but I played the song (and failed), and it sounded just like her voice. Not that it's a hard voice to mimic.
![Eyewink ;)](./images/smilies/wink.gif)
A good remix, though; the Britney aspect just irks me.