As some of may have played it, Mario Kart for the 3DS was one of the first 3DS games. Anyway here's my rating of the game.
Graphics: 10/10
When I first played it, I was suprised. Was I playing a portable version of Mario Kart Wii? Great graphics that's competable with the Wii.
Gameplay: 9/10
It's good but so close. Same features as the DS version but with the Onilne Ghost Data download is still hard sometimes. There are still cheaters online unfortunately...
Overall: 9.5/10
A must-get for players who like racing.