Haven't used that one but I do use Colorchecker Passport which is a similar idea and it is a godsend.
Last weekend I shot an event, shooting and printing on site so shooting small jpegs to one card for speed and raw to the other in case anyone wanted a full size print, I took a custom white balance at the beginning and was then able to take jpegs straight out of the camera and into the dyesub, no editing, job done!