Electronic scales require a bit of faith - I sell scales and program them and integrate them with systems. If you get some test weights, you will learn if your scale is repeatable and linear. These are two things that cheap scales have trouble with. Acculab and Sartorious are among the better brands - Ohaus has their Asian cheapies and their German precision scales. Other brands like A&D are pretty good. Generally speaking, a scale that costs less than $100 is little better that a measuring spoon. A decent load cell alone is generally over $100. I use several in my darkroom, one is a GSE pharmaceutical scale that has 30,000 very reliable divisions and the other is an Acculab that is pretty good even at miligram increments - of course I have test weights and I check them - so there is not a lot of faith needed for mine.