So i got mine today, Actually using it now. :D
Massive, Coming from a 29 inch Ultrawide, the increase in height is significant and will take some getting used to.
Refresh rate is noticeable immediately 165hz is running fine on DP.
Colour, Good, deep blacks, gamut is OK, not as good as IPS in fact I prefer how rich the colour is on IPS.
Some whiteness to darker images, which i don't like, a bit of colour wash out
The OSD is great but there were more(better?) options with the 29 inch, on the image settings, there are only game settings on this screen.
For some reason the OSD has greyed out options, not sure if this is because of DP connection
Brightness, IS OK, not as good as i would have hoped.
Pixel density, not really bugging me in windows. the previous monitor was 96ppi and this one is 93 ppi. In AC Odessey however everything looks BIG. which admittedly is annoying, I loved how crisp and dense the image looked on the ultrawide. Perhaps over time I will get used to it.
Overall i rate the screen 7/10 since i've just started using it. that score may go up or down as I play more games / do other things.
Would i say it's worth the price? Kind off Hard to say as i haven't used a high refresh IPS. I am very particular about image quality and I will likely replace this screen with an IPS in 3 years. For now I'm happy