Paul, I have one Chargemaster at home that I've been using for about seven years. I bought another one for loading 50 BMG at work. I handload about a half dozen calibers regularly. I like how easy the hopper is to empty. The things have worked without much trouble. Occasionally the one at work starts to fill the second I set the pan on the scale. Otherwise, no problems.
Most people don't know that the Chargemaster is programmable. I have a list of functions and syntax somewhere on my computer. I haven't tried to program mine, but may some day.