My friend picked it up at a midnight release for the PS3.
I don't know what it's like playing this co-op PC to PC, but split screen actually works really well. Though I wouldn't call it an FPS, the console implementation works really well. I would normally complain about mouse and keyboard being superior, but this game doesn't really require fast reactions for the most part and seeing what your friend is doing on his screen is definitely worth it. I'm not sure you can see through the other player's eyes PC to PC, but I could be wrong. If that is the case, then this is all a moot point.
It's definitely pretty fun, but I really think portal and portal 2 were both over hyped except beyond a technical standpoint. Not sure if you guys waste your life reading sites like reddit, but /r/gaming was frothing at the mouth for this game. The writing (actually GLaDOS probably said funnier things in the 1st game), style, game play, and controls are all top quality, but honestly I've had more fun with other things. I will probably pick this up for myself when it inevitably drops to $5 in some ridiculous Steam sale.
Also, "edgeless safety cubes" lol.