The reason why NEC offers a variant of this display with its own customized version of the i1 Display v.2 colorimeter (an XRite product) and Spectraview software is for owners to custom calibrate and profile the display. This assures the best possible performance NEC can offer for the individual panel and the customer's individual working environment. There is a huge literature on the benefits of creating custom display profiles, so I won't waste time here going into that. Anyone who needs to learn about it can do a search. The main problem with Spectraview II is that it can only make a matrix profile, not an LUT profile. The former assumes that the monitor's response is perfectly linear and therefore the much smaller matrix profile will be suitable. In fact, the displays are not necessarily perfectly linear and from my experience it is possible to get more accurate profiles by using the NEC-supplied colorimeter, but instead of Spectraview, I use BasicColor Display set to create LUT icc version 4 profiles for actually doing the calibration and building the profile. Like Spectraview, this software supports DDC for vastly simplifying the setting of the basic calibration conditions, and once the profile is built it loads that profile as the default. It works off the monitor LUT. To validate the profiles, I use Basic Color's internal validation function, but to improve upon that, I also use Babel Color PatchTool, which has more thorough potential for calculating dE values between the test's reference table values and the values which PatchTool returns and reads from your display. This use of PatchTool is objective validation because it uses sets of patches different from the ones used in the profile creation software. Also, it can be more thorough if using patch test files having many more patches than included in the profiling software's validation tool.