The game shines in the same areas as other Arkane projects, world building and "immersive-sim" mechanics. What I loved most are the different powers and their respective upgrades, and how these enable the player to overcome the same scenarios in many ways.
That said, a big part of the game is gathering and using information to your advantage, and I really didn't like the way it was shown to you, I found that it all became jumbled and hard to know what was important or not. I believe the devs were aware and this introduced a bit of hand-holding, which in a game like his can take you out of the experience of figuring things out by yourself.