i have been playing online co-op with my friend Lineant18, and it is actually one of the best parts. The story isn't really great, but then again i've never really paid attention to stories i jsut play through the game. it's so fun because we can talk the whole time. basically i just make fun of all the cut scenes and lineant laughs at what i say. i also hit lineant's character for the fun of it. thats another thing you can't do when you are playing alone. its also a lot more fun to kill NPC's when you have someone else there to laugh about it with you.
so if you noticed everything i've said the best part of online co-op is experiencing it with your friend, like it is meant to be. the story and everything is the same as solo but you can't replace the feeling you get when you kill and old scientist and you and your buddy teabag his dead corpse.
