Just started the coop in splitscreen. Gameplay is cool: nice combat scenarios, quite tense and also quite challenging on hard.
There are some things that bother me though, that are very much not like previous Uncharted games. First, there is too much choice in the first menu. There are so many bs things you can add, upgrade, tweak, whatever. Just let me pick difficulty and let's go. And don't say 'you don't have to change these things' because yes, you do have to check them when you want the best out of the game.
Then, the AI is not that good. The sometimes do not consistently attack, sometimes, they run back and forth, and sometimes out in the open. And also, it's bullshit that some guys grab you from behind and you CAN'T melee them. I hit two times in the air while such a guy was in front of me and I didn't hit him and then he grabbed me...
Also, sometimes when you could throw back a grenade you would pick u a weapon... This is SO EASY to program, why didn't they do it or patch it in already? Other things that annoy me are that sometimes settings wouldn't be remembered when you switch between menus: annoying.
This sounds like quite a rant but I do love the combat, the smart level design (well, I only played the 1st level and it's from Uncharted 2 so...) and how good everything works. EXCEPT the aiming and I wonder whether alternate aiming was switched off or something.
I think in general, the game is not as polished as it should be, and this highly surprises me having extensively played the first two (Uncharted 1 four times, Uncharted 2 two times). They were SO polished, every single centimeter was beatiful and every single mechanism worked.
I felt they spent too much time at stuff that doesn't matter (all the bs customization) and too few time in stuff that does (polishing of the gameplay).
By the way, this is a VERY first impression, only of the first level in coop. This is in no way (yet) representative of the whole game, so don't take it as such. It just surprises me to see an Uncharted-game that is not as extremely polished as the previous ones.