Played 3 out of the 4 Coop missions last night with a friend.
Overall its fun but each mission pretty much mirrors the others. Sneak in, find something, bust some heads, interrogate individual Punisher style, then follow up with an objective and escape.
Coop is nowhere near the level of that in Chaos Theory which was stellar. There's only one or two instances of you needing to assist each other opening the doors or escaping. SCCT Coop had you using each other to lift others up and climbing on each other constantly.
The story in this new coop is not too bad but there are some ridiculous moments that is Looney Tunes style boss fights. We're playing on realistic and at times the game is unforgiving the enemy AI is easy to exploit, Few times is stealth the end all requirement so most of the time you can start a fight and draw all the enemies at you.
One thing that was hard getting used to was the controls and there's no way to remap them. Reloading is stuck on the left thumbstick button (L3) and zoom is R3. Also jump and action are bound into the same button (A) and speaks of the complete change in style of the new game.
The gameplay is fun but it's really not "Splinter Cell." This is like to the Original Splinter Cell games like Rainbow Six Vegas is to the original Rainbow Six. I'll be hitting up the SP after we finish the Coop tonight and I can tell how that's going to be. Should still be fun but I miss the old Splinter Cell.