Yes, I'm making a separate topic for this, the game deserves it.
I just got to chapter 18. Right now, I'm loving it. It started off great, slowed down a bit, and jumped right into all the action and epic moments, and this continues on for a while.
Loved the start with the train wreck and the stealth mission, but I felt things were starting to get a little slow once you got into the city. The crumbling hotel was awesome and taking down the helicopter was great as well, but things really got intense once you had carry along the wounded cameraman. Since then, I've been loving every moment. Right now I'm in the ice cave and I just go to the temple looking area. This is just after you fight the yeti beast thing.