Overall a good experience. The artstyle difference its not that noticeable as some people argue and the tracks are some of the best starters.

I'll be updating this review and my own score for every wave released. As far as now, these are my opinions on the tracks:

Paris Promenade - Kinda basic and confusing at the start, but once you get the reel of it, it becomes one of the best.

Toad Circuit - Not bad at all. Graphycally speaking is not that ugly (thanks to the retexture). I guess this would be better if they used a different shade of green for the grass.

Choco Mountain - One of the best tracks: Looks great, plays great. The cave was a great addition to not making this track so monotonous.

Coconut Mall - Simply art, even with the downgrade.

Tokyo Blur - Doesn't have the right to be that good.

Shroom Ridge - Fun track. Graphically inconsistent (some parts of the track have textures, other don't). I'm still a sucker for the original version as a homage to SMB3, though.

Sky Garden - Short and Sweet. I wish it was 5 laps long.

Ninja Hideaway - Easily the best track so far. Great music, great layout.