Don't bother playing Co-op, try it out with Crouching Sprinters

Not gonna say anything people haven't said before. Long, bland, boring maps. Some interesting ideas here and there but poorly implemented.
 Still, you people need to play this in the Crouching Sprinters gamemode. THIS is the way the campaign should be played. It's like the maps were supposed to be racing tracks all along: Long hallways to rush by with a few obstacles on the way, sharp turns and hidden short routes, land mines and explosive barrels placed that can be used to antagonize the one going in the first place, and there's even some points where you gotta unlock doors which allows the people going last to catch up.
Honestly, I'm giving this a 3/5 just because of that. It totally fails as a co-op campaign but it's a nice set of crouch sprinting tracks.