I am going to use this for the entire Co-op campaign and 6th chamber. Honestly, it was better than the main game (it removed most of the story and dialogue), with some greater puzzles but still a lot of easy ones. Maybe it needed an "I've played Portal 2 before" button just to skip the easy tutorial ones in each chamber. The 6th chamber also ends out of nowhere, with no real payoff on the puzzle or ending. Still, it was a decent-sized campaign.