While the uniformity and linearity of this monitor is decent, the supplied calibration software and internal "lut" are not adequate for doing color critical work at this juncture. Light illusion is curretnly working on Lightspace integration for this monitor.
In the meantime, you can get this monitor into proper spec either by turning off the benq color management and using a CMS to profile and generate a display LUT for your color correction software.
Alternately, you can use the display lut on a 4K LUT box (IE BMD Teranex Mini SDI to HDMI). This is how I use one for 4K work. It compares well to my FSI reference monitor.