Yes it is a great tool. I used a Bencher copy stand from 1980 to 2012. The first eight years, I was a multi-image AV producer, copying thousands of yearbook pages for editor training workshops, along with lots of slide duplication and special effects work. The Bencher was key in all of that. I wore out a 55mm f/2.8 Micro Nikkor on my pin-registered F3 with that setup!
I used it off and on as I had eight other jobs at the same company, eventually using it heavily again with digital cameras from 2005 to 2012. I replaced the quartz peanut lighting system with two Westcott TD-5 Spiderlites with 27 Watt photo grade daylight fluorescent lamps in them, and two 32x24 inch softboxes with two layers of light diffusion. That got rid of all copy glare, by making everything a highlight.
Folks, If you can find them, used Bencher copy stands are awesome.