Perhaps it is indeed a placebo effect, but, when I use adjust + to set the azimuth I am consistently impressed by the more lifelike imaging. I also notice that very small adjustments on my Kuzma arm result in better electrical results. No way I would be able to visualize these differences with my USB microscope. The stylus looks good both at reference levels parallel to the surface (love the Wally Reference Tool) and at the final Adjust + optimal settings.
These are not night and day differences but its enough to motivate the effort. And much more of a pain in the butt with a Jelco style headshell.