I opted for this monitor after a period of research.
The main reason was to get a 27 inch monitor with 144 Hz, and since it (to my knowledge) is the most affordable in its class, the decision was not difficult. The monitor does exactly what it should.
The color quality is to first calibrate the Windows perfectly fine, even if they do not like not to get at quality IPS panel, look for movies and games, what I'm doing most of the time, the monitor is perfect.
What bothers me a bit is the time it takes for the monitor to detect the input. He rattles for each input from, start here with the VGA input (WHY ?!), DVI two seconds later, again two sec. Later and finally HDMI DisplayPort, which is really annoying because you only get 144 Hz for time via DisplayPort, which is why the designers actually have to have to think that most users will connect this monitor via DisplayPort ............
The OSD (menu) is sparsely populated, as it has very few settings. Most I lack an sRGB preset because you could still order rausholen the best color results. (Has even my 4 year old 24 "monitor (also TN panel) has the time cost 200 euros)
The appearance is a matter of taste, unfortunately, the high-gloss lacquer dust and above all fingerprints attracts magically. I mostly lying around a microfiber cloth for my glasses, so that's no problem for me.
144 Hz: Yes, the difference is apparent. Not as much as I thought at first. He's only really struck me when I had runterschrauben the monitor to 60Hz for NVIDIA Surround setting (as my other monitors only 60Hz can). Once you get used to 144 Hz, a 60 Hz come suddenly in front as if you could frame lags.
Unfortunately, you'd have hell to spend much money for a triple monitor setup with this monitor (and 144 Hz).
With regard to "only" 27 inches FullHD on: I sit relatively close to the monitor (about 1 arm length), but the pixel density (dpi) is not a problem. FullHD fits perfectly on this size and it is by no means too little ppi. One could of course take up QHD with 144Hz, it must then also more than double output (Asus ROG), which is not worth it in my opinion at the time.
3D unfortunately I could not even try, because my money for the nVidia was not enough 3D Kit, since this is not exactly a bargain indeed. Because I am afraid to wait for my next salary.
All in all a good product. The monitor does what it promises, unfortunately has some flaws, but the overall picture is still positive for me. Therefore 4/5