Lots of fun and incredibly imaginative. The story was a bit lacking and at times saccharine. The voice acting was great with the exception of the little girl who was both grating and terrifying. This is a great game to play with a partner or friend who isn't necessarily "into video games" while still being enjoyed by someone who is, and for that reason stands on it's own as a great game. All this being said, I wish the puzzles were a little more difficult to solve. Alas, no one has been able to recreate the co-op mode in Portal 2.