A relative dropped off her copy of Mario Kart DS, so I can now say that I'm playing a DS game that doesn't involve the stylus.
However, she lost the manual somewhere, so we're not terribly sure how the multiplayer vs battles are supposed to work, and just drive around a giant cake looking confused.
I can't think of much to say about it really. It works, it's cute, it feels less fun somehow than the original mario kart on the snes, probably because I am spending my entire time staring at the minimap on the bottom screen (I navigate better that way?) and therefore don't actually SEE the game very well. Maybe I should stop doing that, I don't know.