Anyway, so I just started this the other night, coming straight off completing Uncharted 2 over the past week or so. I'm up to Chapter 11 "As above, so below" which takes place at 15, Yemen Road, Yemen (or so they tell me).
So far, so good. It's pretty great, but there's one or two observations I have. First of all, it's a little technically inconsistent compared to Uncharted 2. While it's mostly a better looking game, it's also subject to more frequent moments of slowdown (which take the form of a weird skip or judder from time to time). Also, the disc absolutely rapes the PS3's disc drive. It's frequently whirring up and down, getting noticeably louder then quieter. There's also the staccato rhythm of the hard disc drive being accessed on a far more frequent basis than in other games.
The script is quite decent, though. Especially Sully, who has some great moments. The gunplay (I'm using the "alternate" aiming) is still very good, but so far not enough of it. I guess there's a bit too much of the old "cinematic" action (read: not very interactive), which isn't as balanced as it was in Uncharted 2. That said, I'm hoping that the action kicks up a notch in the second half of the game.
Mulitplayer is fun, great fun actually. I might stick with it for a couple of nights when I'm done.