The first thing I should have known, was not to buy a curved monitor. I remember back in the day when everyone used CRT monitors, and when you upgraded to a flat panel just looking at the monitor looked strange, like it was anti-curved even though it was straight. Now I'm seeing the opposite, and I probably always will since everything else in my house is square, like my TV and monitor at work. All the websites I go to, all the pictures I view, everything is just not geometrically square anymore. Just my issue, so I'm not knocking a star.
I should knock a star for the "Mystic Light" that doesn't change. I've downloaded the Mystic Light 3 software only to find out, doh, it doesn't support monitors. So I downloaded Monitor Mystic Light from MSI's website of the product page. Nothing changes anything in the software. I press the "Restore Default" button and the software crashes. The Off setting doesn't do anything, along with all the other effects. Pressing Static->Select All crashes the software too, and selecting 1 of the 9 boxes that look like it's supposed to turn on individual LEDs crashes too. Don't know what "Light of logo" does because it doesn't work. Basically don't buy this for the lights on the back that you don't see, you can't change them, they're always in rainbow mode. My wall is 2' away and that light definitely isn't bright enough to shine on the wall.
Other than that, the monitor works perfectly. I play Doom 2016 with all settings MAX on my Core i7 4th gen with Nvidia GTX 1060 6GB with FreeSync enabled. I enabled the game's onscreen FPS and I average around 140-160 in Vulcan mode using the Displayport. The cool thing about this monitor is that I could probably use the HDMI and get 165Hz too since it has a v2.0b port, which the standard is capable up to 240Hz, and my GTX 1060 6GB has 2.0b also. Don't listen to anyone who says 1080p on a 27" is too low resolution. I opened Photoshop and put 1 pixel on the screen and can barely see it, it's too small. So 27" gaming @1080p is perfect, especially for many video cards out now.
Setting Windows 10 display to 165Hz has a noticeably smooth affect on moving windows. When it was initially at a default 60Hz I noticed ghosting and trailing. But wow, 165Hz in the desktop mode has such an eerie smoothness to movement.
The included pictures (front and back) was after about an hour of playing Doom 2016. It appears the lighting source is at the bottom. There's no noticeable light bleed through the bottom either like you'd typically get with IPS. The contrast is very good and the angle of visibility is good too, not much color change at all angles, I was surprised by that. I've seen way worse on many laptops. The menu joystick works perfectly. Now I can navigate through the menu with my eyes closed.
So all in all for me the geometry is the worst and then the lack of changing the LED colors on the back (if you're supposed to). But the brightness, contrast, vibrant colors and refresh rate makes me love this monitor. And this is with default settings, I haven't tried any calibration yet.