MKDS was great until snaking ruined it for online play, besides being (IMO) too damn cutesy. I didn't really care for the NFS games.....a couple were OK, a couple royally sucked. Race driver is VERY nice for what it is and what it's running on, but the turns are hard to see coming. Asphalt 2 was decent, but not great. I personally hated DKR. Speed Racer was a blast and I consider that my favorite racer currently on DS (Race Driver is 2nd).
I feel that most of the other racers on DS aren't even worth mentioning.
This game.....I don't know, it just doesn't seem fun to me. The sense of speed seems to be missing. The sound blows when hitting other cars.....a kind of a stuttery sound which is just annoying. I saw cars disappearing and reappearing in front of me. It has a sort of a upward-crawling kind of graphics pop-in that for some reason annoyed me. The A.I. will just slam you out of the way if you're in their driving line. Turns seems kinda hard to see coming sometimes and I didn't seem to find a way to kick the ass-end of the cars out to slide around the corners forcing you to instead slow down to where the opponents just whiz by you.
I don't know who is spamming the rating at the top of this thread, but it is anything BUT a 100% worthy game. More like 60% at best. To me, this game is an "el delete-o-matico".