Still have to write mine (just finished the game yesterday). But if you enjoyed the previous ones, you'll like this one too. It's a natural extention of those adventures, focussing a little less on the survival aspect (it's mostly optional now), but adding a more living world in it's place. The exploration and puzzles are again the absolute highlights, while the combat is good but not amazing. The emphasis is more on stealth this time around, and it mostly works, but I'd like to have seen a more open approach to things. Often you are still forced in certain combat scenario's (you'll need to stealth this section, can't escape shooting in the next) and I think there is a missed potential for letting the player play with Lara's skills and creating their own style as so often stealth is the easiest way to go.
The biggest let-down was the story. After promises of a darker story where Lara's shadowy side is explored... it's just isn't really there. And where it gets closest to this promise is in sidequests, not in the main plot that turns very cliched very fast. It's really uneven too. (The shot of Lara rising out of a lake with flames in the background? That scene is cool too see and play, but feels totally out of place and that dark side Lara is very quickly tossed aside again). Also, just as the previous two, this story could have used some lightheartedness. It's overly serious and selfconsious again, whiney voice and all.