Our office has an electronic scale and it's the most annoying machine ever invented. It goes out of calibration at least once a week and the office machines repair guy is in, recalibrating it and fixing it. It sits on a table and is never moved. It's just ornery.
By contrast, the big metal UPS scale in the other office always works. It's the size of a briefcase and is at least 40 years old. No electronics necessary. Just zero it out and weigh whatever.
The electronic scale weighs lighter parcels, and is more accurate when it's working, but it's awfully temperamental. We need to get one that works more consistently. I hope the warranty is still good.