I've calibrated mine so thought I'd share my settings (YMMV). I used DisplayCal and the Spyder5 to get it to a colour temp of 6500K, gamma 2.2 and 120cd/m3 brightness. Settings (anything not mentioned was left at default):
Brightness: 23
R: 95
G: 94
B: 99
The icm profile is here:
https://gofile.io/d/zYakZU
Overall I'm happy with it since I got it for £325 but I'll be returning mine since, apart from the buttery smooth 144Hz which honestly is eye opening, it's a downgrade from my 34UC98 in every other way. So back to 75Hz land for now while I save up for a 'proper' one.