I just finished chapter 6 (first autobot chapter).
I don't know how the console versions are, but on the pc, there are 10 chapers with 10 "stages" in each.
The first autobot one had a group of optimus, bumblebee and ratchet, you chose one to play, I went ratchet. It's all action action action. Encountered soundwave, he ejected some things, I don't really know what happened there, just some more fighting. Ironhide showed up at a point and saved us, and at the end we shot the crap out of starscream. He ended up fleeing.
Controls, I thought I'd be playing on my xbox controller....... no way! The mouse/keyboard rules this game. The controller was too hard. I was quite surprised. Probably because there was no aim assist, or that I'm not used to using both sticks at the same time, I've only used my controller for driving games.
Graphics are amazing, consoles will never know 1920x1080 resolution. I left the graphics on its default of medium quality, and even that was great. The in game was better looking than the cuts. And not a hint of slowdown, very fast and smooth. Oh yea, it uses the unreal engine. That's why I can get kick arse graphics and get them fast.
Whoever decided to not let this game into the country on pc is a f'ing moron. Best arcade shooter game in quite a while. I'm telling ya, this is finally a good transformers game. Future games need to use this as a basis. Promising fps and fps/rpg can be built on this. Sure it's not the best game in the universe, but it's the best tf game ever made.