got my copy yesterday, finished it today. around 8-9 hours of massive art and excitement for me. definitely the best game this year, I think it's even better than BioShock: Infinite. it was just fucking brilliant. the ending was also great, but I wish we could prevent it and get another ending, because I almost cried when the whole thing happened and this fucking beautiful piano play came in the credits.
we also fucked Anna who was boasting us in the beginning of the game, AND GOT A KID FROM HER
all in all, I loved it. the ruined Moscow in the future looks just beautiful, though this sounds weird. I recommend this game to everyone, but if you haven't, finish Metro: 2033 first.