Can't decide if you want this game, or Transformed? I'll make it easy. Buy them both. Wait till they're on sale and get them both. Why? Because both this and Transformed are excellent games.
Ok, so now that we got that outa the way, here's why I recommend this game. I actually started off playing Transformed first when I first got into PC gaming. I absolutely love Transformed which is why I was kinda scared to buy this installment. I had looked up video footage and it didn't appear to be worth my while. Well I had some extra Steam money and had nothing else to spend it on so I finally just bought this game. As many have complained about there is no online multiplayer. Boo hoo......I don't care. I buy games for their single player experiences. What I've always liked about Transformed is that it is a REAL racing game, unlike Mario Kart which feels like dodge ball on wheels. Sonic and Sega All Star Racing is no exception. Even though it is not as fast as Transformed, it is still a balls to the wall racing game. The A.I. DOES NOT rubberband on you like Mario Kart does and the weapons slow you down, but not so bad that your chances of winning are ruined by a few unlucky hits. If I had one complaint about the game, it would be the weapons. They're kinda boring (like Mario Kart) but that's to be expected because this was Sega's first crack at a kart racer. However to me the racing is important, and the drift and stunt boosting are still here though it's not as elaborate as Tranformed is. I love the tranforming dynamic in Transformed, but I don't miss it in this game. What I'm trying to say is that this is an excellent kart racer than stands on it's own and I still like it 10 times better than any recent release of Mario Kart. It still does everything right, and the best reason buying this game as well as Transformed is that all of the tracks are different from the second installment. I bought this game because I wanted more Sonic All Star Racing after I completed Transformed.
Lastly this game is not coded as well as Transformed is so don't be surprised if the game drops a few frames here and there. You won't see the drops in your frame rate counter, but you'll notice the slight stutters. They are not even close to game breaking, but just know that there's nothing wrong with your computer.