Spoiler-free:
I was really afraid I wouldn't enjoy this game because I'd seen a lot of negative reviews, but I'm so glad I stayed with it anyway. I personally found the story as compelling and the graphics as beautiful as the first game, and the updated gameplay was great. There are of course some issues (as with any game), and I do understand why some people had a hard time with certain plot points, but for me it exemplified what I find so great about Naughty Dog; they are committed to creating complex, multifaceted and interesting characters, and they don't shy away from letting those characters make tough decisions. I strongly recommend checking the game out.