Update: Dropping off one star because of the ending. It was rushed. Also, Emilia, the second AI core, didn't get adequate screen time. I really want more of her GIGGLES.
 
Old review: I am really happy to play portal again and that with a completely new campaign too. The new mechanics are really fun and nicely integrated. They don't feel like a gimmick. I really liked the second AI core. She was kind of a waifu, I think.