What are opinions on DDR Extreme

DDR Extreme I like it alot. the eyetoy support could be beter, but it has definite potential. I, however, am having problems with my right hand not registering on the eyetoy... I'm not sure if it's me or the lighting in the room or what.
As far as the regular play mode, it has plenty of classics and good new stuff too. The interface is probably the best yet. It's easy to navigate, select difficulty, etc.  
I think it is the best one yet. I absolutely love the mission mode where you have to specific things for certain tracks. At first it is treally easy, but then it becomes the hardest part of the game.