This game is a masterpiece. I want to give it more than 5 stars. It is by far my favorite game.
The boss fights are the best part. They are all so different that you don't feel bored fighting them. They are also fair, leading you to approaching them in different ways rather than just hoping they don't do certain moves. There is also so bloody many different ones, too! No fights overstay their welcome, too.
The world is awesome. It is super fun to explore and they do a great job of rewarding you with lore, drops, etc. for doing so. There is no point where I was like "Oh, good thing I just went through all that going off the beaten path for nothing." The world is also beautiful and immersive.
The story is fantastic.
You need to play this game. It will be one of the best video games you've ever played.