Acer Predator XB1 XB271HU Abmiprz 27" WQHD 2560 x 1440 (2K) 1ms 144Hz (Overclock Refresh Rate 165 Hz) 350 cd/m2 G-Sync Gaming Monitor, HDMI, DisplayPort, USB3.0

Pros: -165Hz is definitely noticable over 60 or 100Hz. You may not notice it right away, or even looking at them side by side, but if you play at 165Hz/165+fps for a couple of hours then go back to a 100 or 60Hz monitor, it will feel slow and chunky.
-for those games that you can't hit a consistent 165fps+ on, G-sync keeps things smooth
-Compared to the other monitors I considered, this one had the smoothest motion as well as the least amount of bleed, banding and clouding (it's especially nicer than the Dell, has pros/cons vs Asus)
-1440p is especially nice for productivity
-I won the display lottery - I have three of these and no dead pixels, quality issues etc. (yes I like this monitor enough that I bought two more).
-Hits a sweet spot on price for a monitor with these features. the only cheaper one is the Dell, which I did not like at all.
-normal TN vs IPS pros

Cons: -Some may not like the matte coating on the display vs other competing displays (doesn't bother me at all, it's only really noticeable to me when the screen is white.)
-Colours and gamma are not as nice as some of the competing monitors (but better than some others). You can compensate for this by calibrating it correctly, but it's a huge pain - this is where the egg gets dropped.
-Terrible speakers. They're barely louder than a cell phone, why are these even included? Who would buy an expensive monitor like this and then use such terrible speakers?
-The 1080p monitors I use at work make me sad now.
-I don't particularly care for the red colour on the stand - personal preference
-normal TN vs IPS cons

Overall Review: Runnning 3 of these for a resolution of 7680x1440 (48:9) is a sight to behold, but requires a beast GPU to run. expensive hobby....

I highly recommend checking out the Lim's Cave review of this monitor on youtube. It's long, but extremely thorough. It may seem like a negative review, but overall he recommends it providing you are ok with the matte coating, and you get lucky with quality control (the latter of which applies with any manufacturer).

No monitor is perfect - I looked at this and a few others in person before I made my purchase, and none of them would get a "five egg" review. They all have pros and cons, and for me, this one had the least annoying cons.

Pros: Supports a number of Frequencies and has overclock mode. Sturdy and stylish stand if you like red and black which I do and matches my rig perfectly. Full 24" screen which is better then many of the screens that claim to be 24 but are closer to 23.5" across. Really the prefect size for 1080P if you go 27" I would recommend jumping to 1440P. Incredibly smooth with Gsynch enabled at 100Hz. Higher refresh modes had problems see Cons. Reasonable Color quality which may be adjusted and good contrast.

Cons: I like that the monitor can handle a wide frequency range, the bad part is in my tests anything over 100 Hz gives faint horizontal lines across screen. This is particularly noticeable on icons or where you have transitions. I read this could be caused by refresh rates and when testing anything over 100, such as 120 or 144 had the lines present. I didn't try the OC mode beyond 144 given it has issues even at these lower rates. I tried two computers as well (Laptop with Display port Dock running windows 7 64bit and Windows 10 Desktop), both had the exact same issue at 120Hz and up. Also the supplied display port cable was defective and required jiggling the cable to get a connection. Very cheap cable quality. Thankfully I already had a high quality cable which solved that problem. Color quality out of box for me needs tweaking, quite yellow much more then other monitor I use which had a warm profile, I had to go to user mode and adjust contrast, brightness etc to get a good balance between the screens which are both Acer TN models. Also the Power LED is extremely bright making this not great for night gaming. I didn't see an option to adjust this even though Acer has this listed in some of the manuals for similar screens as a feature. The lines also bothered me enough where I considered returning the screen however since its silky smooth at 100Hz its still an upgrade from my other 24" LCD and of course GSYNCH makes it silky smooth like butter which you have to get used to.

Overall Review: I would like to see Acer offer the ability to Dim or turn off the LED on all premium monitors like this GSYNCH screen, the ability to do this is an important feature given this screen is likely to be used in dark settings as much as light. Frequency issue needs to be addressed as well, for the price I expect the screen to work up to the rated speed of 144Hz. All that said at 100Hz it still looks really good but I was hoping with my hardware to hold 140fps in most titles and have a monitor to match that capability. I was going to give this 4 stars but with the defective cable and verified screen frequency issue I'm not getting the 144Hz mode I paid for so I docked one more star. 100Hz is acceptable but the monitor shouldn't cost as much if it cant perform at the rated stock speed without visual defects. Additional info, the lines run horizontal about every 3 pixels and the content render is slightly off color, lighter vs darker which is why its noticeable they run across the entire screen but are more obvious with some content, tested in Tombraider and 120Hz and up they were clearly visible. I have ordered an ultra high end Display port cable in the hopes that might fix it but I believe this to be a monitor defect given that both the included cable, my cable and 2 different machines one running Intel HD graphics and the other running a Nvidia 10 series card had this exact problem running 120Hz and higher. I needed to know it wasn't my card causing the problem. I will update this review if the cable corrects the issue but since the stock cable and another have the problem I dont believe this will correct the issue.