It's a very well-made management simulator with tons of depth and variety. Haven't had a management sim this good in ages, and this one scratches all of those itches.
It's very easy to become obsessive and lose entire days to it. I start playing it and next thing I know, hours have passed, and my neck is sore.
And I still feel like I've barely scratched the surface when it comes to playing with all the different features and curveballs the game throws at you.
I'm also really liking the Grant system. It's a brilliant way to give the player direction as well as a vehicle for progression.
Here's my current prison. It's shit because I'm using it to learn, but I'm having a blast.

They also won't stop getting into fights in the Canteen. I've posted more guards there now, and I'm considering doing a full shakedown for weapons soon.