This will be weird after all the positive comments, but I honestly did not like it --don't get me wrong, technically it's a superb game, but the artistic content felt unimaginative to me. Overall, the game felt like the recent successful popular culture franchises cobbled together, like 'Hey guys, let's put The Ring, put in cool Half-Life type soldier enemies, then add bullet-time! (With enough hype we're bound to have a bestselling title!)'. As you might guess, I especially did not like the story, and level design was extremely bland, with continually similar environments until the end, both visually and gameplay-wise. What impressed me were (especially) the AI, and the graphics, even at medium settings.
Another problem that F.E.A.R displays, apart from the sub-par storywriting in most video games, is the mechanic of quicksaves disturbing fluid gameplay. Since the AI is so good, one expects the possibility of dying in every fight and is somehow driven to quicksaving in-between every gunfight (which are really intense, i should add) --holding back oneself also didn't work as the game was indeed challenging, at least for me. One last thing I should say is that it failed in being scary, creepy or even mildly disturbing for me, which of course depends on one's mood and environment and could be limited to only me as I could play it mostly during daytime.
All that aside, it's a very-well done game --problem is, for me, it demonstrates exactly what's wrong with PC gaming, and FPS'es currently: close to zero innovation. Of course, it's very likely that it's a personal problem I have with the stagnation of PC gaming (and FPS'es

) that's talking right now, and it's entirely possible that you'll absolutely love the game, as in the end, it DOES combine some very good franchises (imho blatant rip-offs of them though) and add them on an enjoyable core game.