A huge improvement over Spark 2, I still have my issues with the level design (mainly the last couple of stages are way too long), but it's still a whole lot better than in the previous games. Spark feels like he controls exactly right in this, nailing how I remember Sonic feeling in Sonic Adventure 2 while making meaningful improvements.

It has its issues but this is pretty much the ideal 3D Sonic game. Like, actually, not just in a "Mirror's Edge is a Sonic game if you think about it" way.

Also it has one of the most baffling endings I've seen in a video game. What the fuck.