I reserved this game long before it came out, because Super Mario Kart for SNES is one of my top five games of all time. This game is definately NOT as good. Here's why:BATTLE MODE: Yeah, this has a 4-player battle mode, which is pretty cool. However, the arenas are too big, and the racers hardly ever get close to each other. The original Mario Kart had smaller battle mode arenas, which are very cool because you come in contact a lot more often. That is a lot more fun than driving around for 5 minutes before catching anyone (which happens a lot in Mario Kart 64).
PLAY CONTROL: When you try to turn normally in this game, you end up turning pretty sharply and you lose quite a bit of speed. However, you can overcome this by sliding in your turns, which doesn't slow you down too much. The part that I REALLY hate is that you can get a mini-boost from turning. What's up with that? I think this adds unneccessary complexity to the game. Why can't I just steer like in a normal go-kart? That's what you do in the SNES version: you steer normally, slowing down before you turn. And if there's a sharp turn, you can use the sliding technique. Very simple, very fun. Just like chess, its easy to learn but takes time to master (ok, its not even 1/10 as hard as mastering chess!).
DIFFICULTY: I beat this game in 2 days, no sweat. The computer isn't very hard. The original Mario Kart took me a lot longer to beat (those 150cc opponents were TOUGH!).
WEAPONS: I hate the triple red shell. Its so cheap! I feel bad when I beat someone by hitting them with 3 of those things. I know that not all the weapons can be equally good, but there isn't that nice balance the SNES Mario Kart had. The Mario Kart 64 arenas don't have many walls, so if you're being hunted with a red shell, you're in for some big trouble.
GRAPHICS: Okay, I'll give the N64 version a little credit, it does have better graphics. Those visual sound effects look kind of stupid, though (and I usually like anything that mimics the '60s Batman show).
SOUND: Two words: annoying voices. There's nothing worse than hearing someone with that super mushroom. ''Here we go! Here we go! Yahoo! Yahoo! Here we go!...''
Okay, I'm done bashing this game. It's not bad, but its nowhere near as good as the original. Oh yeah, another thing I don't like: no Koopa Troopa!