This is what my new 34gk950f looks like:
IPS glow (a bit exaggerated, but this is what I see on black backgrounds during normal use)
BLB
Photos were taken at brightness level equaling 17. BLB is hardly noticable, however glow takes like half of the left side. I rather don't see it on darker images (but not completly dark), but when screen turns black, it doesn't look nice. The bad thing is that it is visible from normal sitting position, let's say 70-80 cm away from the screen. In games it doesn't look that bad, for example in metro exodus it was noticable but not that horrible. In LOL I see it only on loading screen.
Also, I had some problems with brightness flickering on white backgrounds, but switching off "SMART POWER SAVER" (or something like that) option solved that. Beyond that I have no complains. I haven't found any bad or stuck pixels. LG program was laggy as hell (it was literally freezing my PC), but after reswitching USB port I finally managed to update firmware (which takes like half an hour). Colors are great but I don't see stunning difference between my old dell U2412m.
144 Hz of refresh rate is really good but it was more noticable on XF270HUA (which I returned because of other defects). Maybe because I sometimes don't reach 144 fps or maybe because this monitor is a bit slower than acer, I don't know.
Build quality is solid but it could be better for that price. Height adjustment is not as good as on my old dell but it does its job. Stand takes a lot of place on desk.
To be honest I don't know what to do. It is really nice monitor but for sure overpriced (for that money I can get almost 3 units of XF270HUA which is QHD 144 Hz IPS). That glow is really annoying and it ruins my experience a bit. From second side so many people receive damaged screens and so on that I doubt it is worth to play lottery and try again.
If you have any questions feel free to ask.