What little I've seen of the Demo looks absolutely amazing. :)
However... I've only been able to play maybe 10 mins of it because certain controls started becoming unresponsive (I'd have to click 10-15 times before they'd respond, sometimes not at all) and when I finally got back into the game (from a Save) it completely froze up.
Also had a window pop-up with "Are you sure? Yes/No" when I tried to load a Save, and then everything froze up again.
My system specs are:
OS: Windows 10 Home (64-bit)
RAM: 16.0 GB
CPU: Intel Core i7-7700 CPU @ 3.60GHz
GPU: Nvidia GeForce GTX 1070 (8 GB GDDR5)
Forgot to add, I'm playing this build: