Really no different than Ruger's pressure point in their stocks (M77 series), or a BOSS system, or the rubber doughnut. They all can/do work, but need fiddling with, and different loads change the need typically.
Personally if a tuner is in your wheelhouse, I would prefer the Rubber deal.

MZ5 was fooling with various pressure points(not this system, but same notion) some time ago. I know he got some good results, but back to the change of components(bullets, lot # of powder, etc) and he abandon it.