If the only issue with my monitor was light bleed then I'd consider keeping it, but I've noticed a lot more issues since receiving it on Friday:
1) Although in general I don't get the back light doing a slow "flickering", I do get it in some darker scenes
2) I've noticed very prominent overdrive artifacts when at 240/120Hz with adaptive sync enabled which detracts away from the gameplay experience - in addition, on complex scenes it makes it look like oversharpening and looks nasty (I'm hoping this is an issue with my monitor and not the G9 in general)
3) I dual boot Linux/Windows. Interestingly, PBP works perfectly well under Linux, but not Windows (I use it for connecting to work). When booting into Windows, the monitor will not display any picture until I unplug Display Port 2 and then reconnect it. After that, in Windows, the result is very inconsistent, ranging from any of the following:
ii) one side of the screen appearing as a letter box while the other is normal.
ii) both sides of the screen are almost like a duplicate, in that both have task bars, but only one side has the icons and the Windows 10 search widget, yet at the same time it is corectly acting as an extended desktop (not duplicate screens).
iii) one side has 200% zoom the other doesn't
iv) both sides of the screen end up as quarter of the desktop each, meaning a lot of the desktop is out of view.
Basically, running PBP under windows is a joke (more of a Windows/driver issue than the monitor to be fair - Linux works fine).
4) Sometimes on clean boot, the monitor will not detect any signal and it takes multiple restarts of the computer before the monitor sees the computer - I think this is a monitor fault because my old monitor detects the computer fine every time.
5) My G9 has a fading away of the display along the full width at the bottom (~5mm, plus a very slight discolouration for about 20mm before that - the slight discolouration is only visible on white screens and certain colours and you have to be looking for it to see it, but the fading away is more obvious)
That's my list so far anyway. I think it's going to have to go back, I'm wondering whether to go for a refund and wait until the QC is better before trying again.... either that or I might try a 38" LG... don't want to though since I like the DQHD format from a productivity point of view.
Edit: Corrected grammar