The place the design has always been exceptional is with stick powders. But, again, if you want to spend a bit more and retain that stick powder capability, the metal Deluxe Perfect measure is nice and you can get spare metering cavities for it so you can leave them set up for different powders.
I have two of the plastic ones from when they came out in the 90's and whose only purpose is to go to the range with me and they work well for that in part because of the hopper cut-off adding extra leakage prevention. I wish they'd come up with a screw-on cap or one with an 0-ring to handle that problem at the top end, but big rubber bands do pretty well about holding it on.
I also got one of the new Deluxe units on sale to try out, and it is a whole different thing. Hefty and solid feeling. The bench stand for it is very heavy and stable, too, though I did have to scrape some of the paint out of the hole for the measure before it fit. It uses the same hoppers as the plastic Perfect so they change easily. But the hopper is not anchored to the top in any way and would fall off if you put it on its side, so I don't see it as a measure for range use if you aren't disciplined about using the hopper flow lock.