I could see it if you wanted to go from maybe .22lr to .17hmr or .17 hmr2 to .22win mag but I don't really see needing all four calibers...I would tend to wonder if the setup would remain tight after repeated removals/reinstalls like a Redfield scope base. You really only want to move those once or twice and then things get and stay sloppy. Just have to hear some real life experience.
It's very innovative in some ways...but also a product created to fill an "artificial" need. 22 LR, 22 mag, 17 HMR, 17 Mach 2...pick one - I think they are all pretty similar in performance or more so, in application.