Let me explain the title first. With Adventure 2, I used to get massive motion sickness with the Knuckles/Rouge boards and couldn't beat one of Rouge boards and ultimately gave up on the game. I never fully played Sonic Heroes but did try the demo. That all said, Unleashed is definitely the best 3D Sonic since Adventure 1. I still place Adventure 1 at the top, because of two reasons: 1) the wow factor we all got from the first true 3D Sonic game, and 2) despite all the different playable characters and adventuring, it was actually fun.
Unleashed has some of the best 3D Sonic action stages around. However, some of the latter ones get frustrating, featuring cheap deaths by design (and not bad programming), on a scale greater than in any Sonic game beforehand. Still, I will see the bright side in this and say that they raised the challenge of the franchise, which has often been accused of mindless holding of the "up" direction on the analog stick.
Now let's talk about the Werehog stages. First of all, they are not bad or glitchy. They are, however, consisted of repetitive-looking environments, annoying block puzzles and some tricky platforming that'll have most players frustrated. The combat is actually the fun part of the Werehog stages!
Okay. So we have the brilliant Hedgehog stages, highlighted their increased difficulty, and then we have the Werehog stages, which get boring really fast, but are highly polished and playable. I would've kept playing this game if it wasn't for this next game design flaw: mandatory collection. Yep, you gotta collect emblems called Moon and Sun medals to advance the game and the story. I do not have the patience I used to with video games. I want instant gratification. That's not to say I do not appreciate a challenge. However, if that challenge is looking around 3D environments in every little nook and cranny, breaking every breakable thing as a werehog, etc. the game designers have failed at their job and I will stop playing.
Sonic the Hedgehog is at his best in the game. Hes fast, controls are easy, and it's the closest to a rollercoaster you'll ever get in a video game. This is how 3D Sonic Games SHOULD be like. Unfortentally the greatness Sonic the Hedgehog should be, is held back by a ruined, Werehog version of himself. This game would be the first good Sonic game I've played in ages, that wasn't played on a handheld. The worst crime of this game, is that it FORCES you to play as the Werehog. If I can completely ignore the ugly little thing, and play only Hedgehog stages, I would be more then content with this game. Even with a lack of levels.