It's a really good game where you can tell Naughty Dog wanted to take the game in a slightly different direction. It felt like the game was sometimes responding to the criticism of Uncharted games having you fight way too many guys. There are a lot more sections in this game where you are just walking around and platforming.

I think the biggest flaw for me is that these platforming segments are a little too long for how mechanically simple they are. They add a grappling hook and eventually a tool you can use to dig into certain surfaces to climb them, but it's just not enough.