This is the best Sonic game in five years but that isn't saying much.
The 3-D sections, though I seem to not like them Aren't bad because they are normally short and few and far in between, but the 2-D sections are tedious in the later parts of the game. In the beginning you run, platform here and there, and destroy robots, but in the late parts it turns into platforming on moving and mostly small platforms and more platforming. Worst of all The platforming takes forever because it's are bunched up.
On the bright side the graphics are amazing. During the area based on sweets I swear I may have started salivating the graphics are that good.