I got the Pact digital scale and their electronic dispenser from Midway back in the 1997-98 span and they have given me good service. I follow the instructions and use their calibration process exactly as they said, resulting in 20+ years of accurate and fast dispensing and measurement. I presume that sometime in the future there will come a problem, but it appears to have been a good investment.
I do have a couple of very good powder measures that I can trust if I am willing to use a scale for verification, and the cheap Frankford or National Metallic does that chore without the calibration routine. Check weight at 20, tare the pan/funnel and go to work. That is OK for 10 or 15 rounds, but more than 20 means the Pact Team gets a brief workout. Prairie dogs get the benefit of hundreds of rounds of uniformly charged ammo, all with a couple of pushes of buttons.
My hands are not as steady as they uster be.