I got the same monitor. Only worry was the frequency oscillation feature to achieve dimming, but I don't notice it, but some claim they do.
Back joystick is a bit of a pain as I do flip back and forth between inputs.When my system goes to sleep, and it wakes up and i turn the monitor on, it sometime does the sync flicker (even goes black) and repeats and generally looks screwy for about 10 seconds,but once its running, never had any issue.
Is well worth the money! The monitor is sooooo bit, that you have to really move eyes, or even turn head a bit, so certainly I doubt i would everwant bigger, accept that in having this monitor, I can now REALLY see the attraction of a curved monitor.
I would have no interest in upgrading to say a 44"+ 4k monitor unless it wasvery curved so you don't have a distance issue as you look to the left/right edges over the closeness of the middle. In fact the odd person may even find the 40" to big, and want it tobe curved. Of course one issue is you have to buy a expensive video card to use it, unless you happen to already have a 9 series.
-- Regards, Clifford Ilkay + 1 647-778-8696