This game is a game of extremes. As others have said already the athmosphere and general feel of the game is amazing. Some levels are just chefs kiss in their design and how they feel. That's by far the best thing about this game.

On the other hand you have the combat, and oh boy it really isn't that good. It feels a bit like your typical Elder Scrolls melee combat, in that you pretty much just slap at the enemy until it drops dead. Also ranged weapons are absolutely OP in this game and the combat just isn't strong enough to carry me through this game.
Besides that you have mechanics like alchemy which felt really tacked on for me.

If you love exploration games totally get this one. But if combat gameplay is important for you then maybe just skip this.