2 years now actually, and I'd still rather it then EXTREME. The song list is just better in my opinion. I'm not going to say I don't miss any songs from EXTREME, I do, but there are so many more great songs on SuperNOVA.
Great song from EXTREME:
Speed Over Beethoven
Senorita (Speedy Mix)
WWW.Blond Girl (MOMO Mix)
I'm In The Mood For Dancing
Great Songs from SuperNOVA:
Rainbow Rainbow
Nijiiro
Red Zone
Flow -True Style-
Cachaca
Freedom
Xepher
MAXX 300 (SMMM)
Maximizer
Still has great songs from EXTREME:
Sakura
Tsugaru
Am3p (303 bass Mix)
Healing Vision
(As you can see I just picked songs I really like)
This is just when opinion differs, it may also be taste in music. One thing I love in SuperNOVA as I've said before, they got rid of those "acid trip" videos and have real choreography going on, not that's it's good, it's just real. Most people hate that, but I love it.
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I'm not the best but I'm a DDR nerd.