I purchased:the 31.5 inch WQHD 1440 monitor for $280 on Amazon Prime Daythe 27 inch WQHD 1440 monitor for $320 while it was on a saleTL;DR: The 31.5 arrived in great condition, but slowly developed dead pixels. I'm hoping the replacement won't have similar issues. The 27 arrived in horrible condition, almost looking "used", and I returned after testing with my setup.I did a lot of research before choosing my monitors, and I found ASUS to be a great brand. They offer great quality at a good price margin. And from what I could tell, these should be great monitors. But in my case, they simply weren't.The first monitor I bought was the 31.5 inch. This monitor arrived in great condition! It looked great, and once I hooked it up, it worked great. The huge, curved 1440 VA screen was a massive step up from my 24 inch 1080 TN screen, and was great for productivity and gaming. I won't go more into detail with its performance, feel free to read other reviews covering this.For the first two weeks, I had no issues with this monitor, and really enjoyed the upgrade. However, I slowly started to notice random blue pixels appearing on the right side of the screen. After running a pixel test (http://lcdtech.info/en/tests/dead.pixel.htm ) I found 6 dead pixels scattered across the right side of the screen. Given, on a 2K monitor these pixels are somewhat hard to find if you aren't on a solid-colored screen. I never noticed it while playing CS:GO, but while web browsing I noticed them fairly easily.Either way, this was very concerning. Monitors should not be developing dead pixels within a few weeks of use. I placed a request for a replacement and hopefully these issues aren't present in the new one. I don't have pictures of these pixels, as I've already packaged up both monitors and will send them out tomorrow morning. (I'm typing this on my old 1080 monitor, it sucks).While these pixels appeared in the 31.5 inch, I ordered a 27 inch to either replace or supplement my existing monitor. This was considered because my desk isn't deep, I'd say it's average. And with a monitor above the size of 27 inches, a deep desk is preferred to accommodate the larger viewing angle.The 27 inch monitor arrived promptly in undamaged packaging, but while unboxing I found the monitor to be in a seemingly used condition. This was very confusing to me. The monitor was fully wrapped and sealed, but the screen was covered in scuffs, the bottom of the monitor was scraped up, and the back section by the ports was heavily scraped, with the display port damaged. After further unwrapping and attaching the stand, I also found another problem. This stand was very loose, and the monitor freely shook separate from the stand if I were to move it.This was in horrible condition. I don't know if the QC somehow goofed, or this was somehow a refurbished product, or the monitor was damaged in some other way before it was sent to me. But either way, this was unacceptable. After taking some pictures I placed it on my desk and used it for about an hour. From what I could tell there were no dead pixels. Afterwards I packed it up and sent it off back to Amazon.I really wanted to write a solid review. The 31.5 inch has been a great experience, but if the replacement for that one starts to have problems too, I'm gonna have to look elsewhere. I'll leave a follow up with how the replacement treats me. My advice is to do plenty of research and figure out exactly what monitor you need. If this still fits the bill, buy it, but make sure to use it plenty during the first month to ensure it works fine. Otherwise you won't be able to return it through amazon, and you could be out a monitor for weeks.