When this first came out, I was truly excited, and expecting quite a lot from the new DDR game. Sadly, though, I soon joined the throng of disappointed fans.
While some of the step charts are finally updated and given a new makeover, the main problem is the songlist. While fans did ask for more US songs...we did not expect to see an influz of Britney Spears and Hillary Duff songs on our beloved DDR game.
Also a major disappointment was the new setup for unlocking songs. Players must now go through "Superstar Mode", which quickly gets monotonous and boring after a few of the missions. While they may be great lessons for beginning players, any slightly experienced player (including myself) will become very frustrated at the simplicity one is forced to trudge through.
Also, oddly enough, Supernova got rid of the ever popular Autosave feature. In the previous games, this nifty feature would automatically save as you played the game. Now, you have to go back to the main menu, bring up the save menu, and select the save, and confirm the save. It's a lot of work that you shouldn't have to go through.
However, not all is lost...although it came very close to being it.
Supernova shines with its Workout Mode. While it has a few obvious kinks to work out (which are fixed in the next game), the ability to customize workouts and save different profiles is a lifesaver for those who want to use the game for weight loss.
All in all, if you are new to the series, I recommend first starting out with Max, Extreme 2, or Max 2...but if you have every game already like I did...you may as well pick up a copy.