Just thought I'd share a few thoughts on the CX which I set up yesterday (bought from John Lewis).
I believe somebody in this thread posted a little earlier that they were experiencing some kind of electronics/burning smell coming from their set? I definitely have the same thing. Perhaps I am noticing it more since i've set up the panel in my bedroom rather than a living room, but the smell definitely lingers. If it persists I will send this unit back as its giving me a bit of a headache
The picture quality itself is immense. Using it as a monitor, the initial experience is that the screen size is much too big for anything but the largest desks. My desk has an 80cm depth, but I will probably have to fit a keyboard tray to extend the distance a little further.
Another observation I had was how much difference a glossy monitor has on the overall quality of the picture. Anti glare coatings on most monitors (I have a AW34) suppress image vibrancy, at least in my opinion, but the trade off makes sense as I can position my monitor next to a window and still use it without issue. You will need to put in some extra thought when positioning this panel.
I had intended to run this panel as an ultrawide with black borders at the top and bottom, like I've seen done elsewhere. This works reasonably well, but some games will try and adjust the resolution themselves or mess up the setting (Metro exodus seems to do this a lot). It isn't quite the 'plug and play' simplicity of actually just having an ultrawide monitor, so perhaps that is something to bear in mind for those who want to go down this route.