I bought this earlier this week and it's pretty fun. Very different from IV and V IMO. I gotta say I'm liking the world tour mode more than I thought I would, I thought I would hate it. It's a little silly and I really don't care too much for the controls when exploring the world. But it's kinda fun making your own custom character, leveling them up, fighting gangs of people with boxes or TVs on their heads, and meeting different SF characters. Also, being able to unlock 2nd costumes without paying for them. I'm definitely still getting used to the game, but it's been a good time so far.
My only complaints are that it randomly will have massive frame drops from time to time for no apparent reason. I'm playing on PC, with updated graphics drivers, so hopefully it gets fixed soon. I suppose most new games take a few months to iron out the major bugs, but we'll see. Also, they NEED to make it so you can choose whether or not you want to play VS classic or modern control players online. I don't want to play Street Fighter against someone using Smash Bros controls, that's fucking dumb as hell. Sure the modern controls are limited, but I just don't want to play vs someone who's not really playing the same game control wise.