This is a great addition to the Street Fighter collection. What's nice about it is it stays true to Street Fighter roots while adding some pretty interesting additions. I like that SF has stayed along the classic 2D style of gameplay, it's always been preferred for me over 3D fighting games. However, they did add some 3D elements that are mostly animations that add some cool visual effect to the game. The directional pad can be frustrating to use until you adapt to it, depending on your experience with the Xbox 360 controller and fighting games. Using characters that require charging back or down for 2 seconds for special moves can prove difficult depending on your skill level. The new focus special moves and super special moves (can't remember what they're called) are cool editions, but if you're playing someone who is well accustomed to using them and you aren't, you're done for. If you like to play against the computer, and you play on the hardest level be prepared to be dominated by combinations of super attacks and focus attacks. It is labeled "Hardest" for a reason though, so no complaints here.
The only problem I have with the game is the Xbox Live portion, which was actually the portion I was most excited about. Finding a match against someone with a good connection can be a pain, and sometimes the lag is so bad it will take a full second for the game to render a command. Also, when you search for potential opponents, the game brings up three choices, and all three of those people might be in a game already. Why format the search this way? There should have been a search filter that searched for the optimal connection speeds and only displayed those hosts that weren't already engaged in a game with someone else. I've spent up to five minutes just searching for someone to play with on Xbox Live...very frustrating. If you have a friend who also owns the game, it is relatively easy to connect to that friend via an Invite to Game request.
Despite the multiplayer downfalls, the game is extremely fun if you're a fan of the series. I think some of the new characters are kind of dumb, and I'll never play as them, but they're still fun to play against. If you're a fan of Street Fighter, you'll be a fan of SFIV.