So I just got a 3DS and Mario Kart 7. It is a lot of fun, very similar to Mario Kart DS, but even better.
The 3D on it is integrated well, and is not too distracting, but can be a problem if you aren't looking it at it with the perfect angle.The coolest feature they added was a first person view, and you can drive by tilting(like MKWii).
I also made an online community for the crinkly Mario Karters out there, you can join it by looking up the group code 64626373928003. Hope to see you all on the track!