
The gray card on the back is useful. Calibration scripts generate a million errors and are completely useless. The frame of the table top is made of cheap paper and has no rigidity. Absolutely useless. The color page is useful for eyeball comparison if you have a calibrated monitor. It is also useful for checking the accuracy of the scanner. Very cheaply made. The information on the download CD is poorly done and the scripts are missing a required file. Finally found this on the author's page. But nothing written in the script actually works in the real world. But if you just need a gray card,

20FTX10FT Gold Shimmer Sequin Fabric Photography Backdrop
36 Review

π Foil Fringe Curtains Party Decorations - Melsan 3 Pack 3.2 x 8.2 ft Tinsel Curtain Party Photo Backdrop - Ideal for Birthday Party, Baby Shower, or Graduation Decorations in Eye-Catching Pinkish Purple Hue
25 Review

Large 59 X 78 Inch Selens Oval Reflector With Convenient Handle For Professional Studio And Outdoor Photography Lighting, 5-In-1 Multi-Functional Reflective Surface
31 Review

Professional Photography Studio Setup: LOMTAP Backdrop Stand Green Screen Lighting Kit With Softboxes, Umbrellas, Reflectors And More
24 Review