I bought one years ago, early '90's. Doesn't work worth a damn. The rings are not sharp enough, too smooth to catch the primer and flip it over. Can shake it all day and always enough primers not turned over to be aggravating. I always just used a cheap plastic one. They may have changed the design since.
I think I have an extra one, I'll check this afternoon. Instead of shaking, I just dump the primers, pick up the ones that are turned correctly, then put the lid back on turn it over remove lid and pick up the rest.