Got my copy today, it's fukking great. It's like a big Dishonored map with great shooting. I've already stumbled across secrets that I can't decipher until I'm further in. I'm a huge Arkane fanboy. I'm about 1 hour in before I got 'content not installed' issue on PS5 - see the bottom of my post if you're getting the same issue.
The levels feel a little small and you go back to a lobby to update your loadout between levels, this is the only jarring thing so far. No glitches or anything bad though.
The writing and story are fantastic so far, but this is Arkane after all...