Yeah, got it yesterday, played around for about 6 hours.
Unlocked Marth, and another character. I forgot who.
Almost unlocked Luigi but he whooped me sorry as at the last second with a Dragoon.
Fox is my number one right now. I love how his midair foreward attack "rapid multikick" now holds enemies there for the full attack. Plus his new taunt makes him totally badass.
Also, the little SlowMo you get whenever you unleash a more powerful attack is really sweet.
I spooged about 4 times while playing.