I sell antique paper and graphics on ebay. Accuracy matters when attempting to communicate to online customers the genuine color rendition of a vintage magazine cover, chromolithograph, hand colored engraving or antique map. For my work I only need the base pack for my Panasonic G85. I also have the base pack for my Pentax K70 for personal and pleasure photography. I was using the X-rite Color checker which only got me 90% of the way to accurate colors, but the Cobalt Base Pack gets me all the way! I have Cobalt Image installed in Lightroom Classic and it is super easy to used. For most paper items I adjust a RAW image in the develope module to my preferences along with Cobalt Standard, then save it as a Profile. With the profile I can make a baseline adjustment to hundreds of images with one click of the mouse. Very seldom do I need to any additional adjustments other than straighten and crop. See the attached sample. Left is X-rite Color and right is Cobalt Standard