I'm using this extension along with MB Settings Page and Meta Box Tabs to create a tabbed settings page where some of the tabs are only visible to administrators. I have this part working correctly, however when the meta boxes are hidden for the non-admins, the tabs for the non-existent meta boxes still remain. I would of expected them to be hidden as well, I think it's a bug.
Because we are registering the tab before the fields which are shown on the tab as the code in the documentation so I think it's just the user experience. But I will discuss with the developer team to improve this case.