Just got mine about 4 hours ago with PW and SSF4.
First the 3DS looks really cool. Nothing to do with the first DS model lol
Second the 3D is awesome!
Third, SSF4 is pretty good, looks good, plays good, 3D is really well done, especially when finishing a combat.
Fourth, PW is AWESOME. As fun as the old one albeit a bit easy.
Fifth, AR is pretty good. Already unlocked all the minigames (had to cheat to get all the coins :P) and I can't remember the last time I had this fun playing a game (Actually, since Just Cause 2). Great use of simple mechanics. Wish it was longer :(