There are some problems with it though, some of which are specific to the PS2 version which I have. There is noticeable graphical lag in some parts, the menus and save times are reaaaally slow, some of the note charts seem to go in and out of sync, the graphics are terrible (worse than GH2). The only problem I have with the game in gerenal is a lot of the note charts on expert were made harder for the sake of being harder, rather than being true to the song. While the increased difficulty is nice, it makes playing some songs boring as hell.
That said, I still <3 it.