Street Fighter IV is great!!!
Good :
Easy to learn moves
Very fun playing with friends or single as it is quite challenging
Great characters
Fast paced. ( For me it is quite fast compared to other games like Tekken 6 )
Ultras look really nice and cool too and when you pull it off in a combo it feels like a achievement considering its really hard to combo
Bad :
After you learn all moves and keep using combos with the same moves it eventually becomes a bit repetitive for some people.
Some characters are more powerful than the others so its kinda a bit balanced
Lots of skills only hit the character once and they fall on the ground so basically its really hard to combo unless they're in a corner.
There's not really much story to it. Only around 2-3 small cut scenes per character and doesn't really give much
Despite the bad points the game overall is still fun and i enjoy it on single and playing with friends. I recommend this game if you want to pick up on a game really fast and have fun at the same time. You should at least rent it even if you're not a fond of fighting games. Worth the money in my honest opinion.