My comment wasn't about yours in particular, moreso about some I've read in the past by folks who tried one out and couldn't get the hang of it.
True, it isn't the fastest. It is quite simple, and it produces a very consistent result with the case mouths cut off square to the centerline. It also doesn't depend on the quality of fit of a pilot to the inside of the case neck.
I use the basic model with the simple screw adjustment and no hold down for the case holder, my fingers work fine for that. I did treat myself to a TiN coated cutter head when the original got dull after many years and thousands of trimmings.
