Better Mission Mode, YEAH!
As you dance, you get points you can spend on things like new outfits for dancers, customizing your arrows, getting new songs, unlocking more missions, and even finding hidden arrows. Yes, you can buy hints at where the hidden arrows are, which in turn unlock even more missions. With things like this, DDR will never get old.
The music has new and old songs this time around, and some are fast some are slow. The only con I see is workout mode is a little obscure.