Finally got round to buying Portal 2 yesterday, been wanting this ever since it got released, managed to pick up the Xbox version for £1.49
This game far exceeded my expectations, it feels like 2 games in one because the co-op feels like an entire new games itself. I could spend ages going on about what I love in this game but it will probably be things you have heard people say a million times before.
One thing I did want to mention were a few bugs I encountered, The 2nd time I started the game up, all the graphics on the main menu were screwed up, so I ignored it and loaded my single player game, but when it loaded, it spawned me above water and I died instantly, thankfully when I respawned it was on land, then the graphics messed up when I paused the game >_<