Well, I'm going to swim upstream here. I have one of the cheap Frankford Arsenal scales.
Frankford Arsenal DS-750 Electronic Powder Scale 750 Grain Capacity
It holds zero well. If it has been more than a couple days to a week, or if I am trying some new powder, I calibrate it prior to a loading session. Accuracy is comparable to the two beam scales I have/have access to. It comes with a calibration weight. Takes less than a minute to calibrate.
I love the fact that I can set tare with the empty primered case, drop powder and then weigh the powder without having to calculate, or pour powder from pan into the case.
Some have reported problems with this scale. Many report satisfaction with it. I have had no problems.