Tomb Raider's PC version is generally strong, offering a better-looking, higher resolution, smoother tomb-raiding experience than its console counterpart. That said, if you're using an Nvidia graphics card, the game could be unstable, although that instability is usually fixed by turning tessellation off.
Good news: A beta driver released by Nvidia on Friday clears the issue right up, and ostensibly offers some performance improvements across the board too. I installed the driver for my 660Ti and have been running with tessellation with nary a problem.
It's been cool to explore the island a bit in the aftermath of the story, just like Evan said it would be. That said, I think I might actually start a replay of the game on a higher difficulty. My bow and arrow misses having moving targets.