The saturation, brightness and sharpness are excellent, especially the reds which really leap off the screen.
However, like some other purchasers, I have found that I get a marked halo along the leading edge of objects with straight lines. I play a lot of Wizard101 which is a family orientated game with bright colours & high contrast elements in scenes. When scrolling, I get a 1mm or so pale halo along the leading edge, which I find very distracting, especially since it shows on all objects. I have managed to reduce it after some playing around with the settings, but can’t remove it all together.
Having said that, it does depend on the game. I’ve tried Doom, Doom Eternal, Unreal & a couple of other FPS games & being that they are much darker, this problem doesn’t occur at all.
It may or may not bother you, depending on how picky you are, but given that it cost me nearly 300 & this never happened on my previous 120 monitor, I’m a bit disappointed.
It is particularly distracting when scrolling around web pages especially as the type is small due to the higher resolution. Again though, this does depend upon the colour scheme of a particular page.

I do feel that I need to take LG to task about the refresh rate. Yes it will do 180Hz, but not out of the box, & not in the normal mode. You have to put it into G-Sync mode at which put an Overclock option becomes available. Being that overclocking in general can cause problems, some people may not be comfortable putting it into this mode.
This is also the only way to make the HDR active. This time though there is no option, G-Sync switches it on whether you want it or now.
Overall a good monitor, if you can live with the limitations.

Coming up from a 1080 monitor this a treat for the eyes, I find this is totally adequate in a well lit room not yet seen it in very bright sunlight. Colours seem fine without being overly garish, not played with the settings as yet as haven’t needed to but the menus are easy to find with the joystick on the bottom side of the monitor, double click and your in.
I watched someone playing league of legends and company of hero’s on this and there was no ghosting to be seen so for a mid range monitor I am very pleased with this purchase and would recommend it.

Did few days of intense research and review readings of all different 27′ 1440p 144hz+ monitors.
Ended up on this or GL850 for me.

27GR75Q is new “budget” model so proper review websites don’t have any info on them yet, but I took a gamble.

Went with 27GR75Q instead of GL850 due to the panel.
Newer ones are Nano IPS where colors tend to be oversaturated and not beneficial for gaming (that work on sRGB still), causing a lot of eye strain.

GR75Q has been fantastic to me so far. Colours and brightness are perfect (a bit too bright to me but that can be turned down, which is funny seeing a couple of people complaining about brightness but I guess I don’t play in a greenhouse).

LG settings menu is fantastic, you can adjust almost everything without any issues.

Build quality is really nice, the only weird thing is that my monitor plastic bezels’ gap are different, left side is nice and night with 1mm gap but right is a bit more open around 5mm. But you can’t see that, simply nitpicking for this price I wouldn’t really complain about such a thing as it probably varies from monitor to monitor on what you get.

It is not as heavy as I expected it to be, fairly light to be honest – holds on VESA arm with other monitor just fine.

No backlight bleed or backlight glow – which is a massive win over more expensive ones like GL850 where you get that a lot big time.

For the price I paid which was 220 at the time it was literally a steal for such monitor, in my opinion.

Unless the bigger expensive ones go down the price by another 100-150, look no further and buy this monitor as it is fantastic.