I bought two ASUS ProArt 27" QHD monitors about a year and a half ago. I'm very happy with them. Only issue that I have is that my HP 840 G5 laptop which is connected to them via a docking station and display port sometimes has trouble connecting initially. I usually have to turn one or both monitors from standby to off, and back on again to get it to sync up. Rarely, I will dock the laptop and I cannot get it to connect with the monitors until after reboot. I'm running the latest graphics drivers. Suspect the issue is either the laptop, cables (cables are only 6 ft long so doubt that), or perhaps the docking station was not designed to handle QHD output.
Give it a few years. At first Asus is great...