Been using what Lee calls their Deluxe measure, was the Classic, for the past four or five years. Its all mental construction save for the powder reservoir. I use it for all powders but ball and flaked. For those I use my old trusty 55.
No need to remove it from a bench, close the reservoir, dump any remaining powder, remove the reservoir then empty it into the powder container.
Accuracy charge to charge? About same as any other run of the mill measure why I throw charge slightly under weight and trickle up. BTW, it doesn't cut kernels of extruded powders even those such as H4831
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https://leeprecision.com/deluxe-perfect-powder-measure