This is a masterpiece. Fair warning, it ruins all other video games that you'll ever play.
The AI is absolutely brilliant; if you're reloading or switching weapons, you'll hear enemies planning to get closer to take advantage. Ally AI is fantastic: you'll think that you're done for when grappling with a zombie, and all of a sudden one of your allies will pull it off of you, and if an ally is ever in the same position, he'll call out your name for help. It's all the fun of co-op play without wanting to punch your younger sibling because he got you killed.
I won't give any plot points away, but you'll find yourself beginning to empathize with the main characters the farther you get into the game. The story is riveting, cleverly avoiding cliches and keeping the player guessing. Don't read any spoilers, seriously; just enjoy it. You'll also get to follow a side-plot or two if you're good enough to find "relics" in the form of notes left by others.
I don't even think that I need to comment on the gorgeous, immersive environments and visuals. Rent it, and you'll probably end up buying it.
I have been waiting for this game for a long time, and I really hoped that it would be great. I was not disappointed one bit. Sony really hit a home run with The Last Of Us. The graphics are the best graphics I've ever seen in a game. The surroundings and the atmosphere is amazing. I was immediately hooked as well. The story is one of the best stories I've been a part of. I felt immediately connected to the characters, which is a huge plus for me. I have nothing bad to say about this game. This game gets an A++. One of the best games I've ever played.