Gotta admit, Naughty Dog has a hit.
This game could be a movie, due to the amazing story. Nate and the other characters weave a tale so amazing; you won't want to stop playing until you get to the end. The mystery surrounding El Dorado and Sir Francis Drake pulls you in. Also, the characters are very dynamic. Nate, Sully, and Elena are very good characters for a game and you really begin to appreciate them.
And now for the gameplay: Pretty much, it's a third person cover shooter game with some platforming elements and some puzzles to solve. These puzzles themselves aren't really hard to solve, but they are quite clever. The shooting mechanism is pretty good; however, when dealing with the enemies, it takes a lot of bullets to kill them, while it only takes 3 for them to kill you. Also, while the platforming is pretty good, sometimes Nate won't reach for the platform and fall to his death.
Overall, Uncharted: Drake's Fortune is a very good game, and definitely worth it. It's not perfect, but it's really fun, and worth an 8.5.