The previous game, as mentioned, was pretty good. But not good enough for me to pick this one up as well. Might do it if I find it in a sales bin somewhere though.
Racing in Mario Kart has become as predictable as throwing a dice (or a "die" if you're a grammar nazi). When I played MKWii for the first time I was in 5th place, got Bullet Bill and went all the way to first place with only a few seconds left of the race. My mates got pissed and I didn't feel any sense of accomplishment. This sounds like a step in the right direction, if it truly is based on skills.