I've literally just started using one of these. It takes about 30 seconds to throw a charge, and excluding the first 3-4 throws which were completely bonkers, they seem very consistent. I confirmed the first 50 or so with another scale, and I've stopped bothering as they've all been pretty much the same.
I just added another RCBS Chargemaster 1500 to the bench, running 3 total now. I debated and researched the Lite and almost pulled the trigger just to try it. I decided to stick with another1500 because I like them and work very well for me.