This is my first racing game I have tried on a 3DS. I liked it, but it wasn't the best game for the 3DS. There are lots of levels for the game. They are the typical medals (Bronze, silver, silver+ Gold, platinum, etc.) So ranks with 5 races each rank.
There were a bunch of cars but most of them just went the same speed as the other. If you got different cars, they were most for looks.
After all, it was just the average racing game but in 3D. The 3D graphics made it look good. You should try it out.