I tried it out a minute ago and it was pretty fun. In the begging they let you choose smgs, shotguns and there is also little grande boxes which lets you grab every greande. Than they leave you into the island with your buddy to fight against phoenixs (especially the heavy suited bad guy). And it also has great theme, where its night and you have to take out all the terrorist that are camping and protecting something important. I really like the way valve made this co-op misson.
Did you guys also played it and tried it out? Because i would highlly suggest you guys to try it out.