Summary: I purchased this game because it seemed very similar to IIDX. The first thing I noticed was the insane learning curve. On beginner mode, up to about level 5 songs are pretty easy. Then level 6 they just go insane. The patterns do not follow anything that is going on in the song, and even counting the beats didn't help. I was dissappointed the game wasn't more friendly to beginners. The music selection while large, offered very few songs I enjoyed.
Summary: I've played the Asian versions of this game and it seems to be pretty similar to the originals, with the enhancements of the most recent "Black Square" edition. If you've played DDR or Guitar Hero, you pretty much know everything about the game play. Notes fall down the screen and you must hit them at the right time in order to score. There are some notes that will stop the background music if you miss them.