I like my GemPro 250. Negatives for ME are the flat panel display. You have to be over the display slightly for good viewing. It being accurate to the extra decimal place is tedious trickling charges and trying to get the "exact" powder weight. It seems to be a little slow to react trickling powder. It for instance will show 24.82 then just a few more flakes of powder and it jumps to 24.86. The extra digit is hard to trickle to. Kind of like it freezes for a while and doesn't move and by then you've trickled a tiny amount too much. It is accurate to .02 grains and computes in .02 increments, in other words it doesn't show 24.85 but moves from 24.84 then next to 24.86. At least mine does. It's almost TOO accurate and touchy if you use your scale to weigh every powder charge and attempt to get all exact but if you load for instance 24.1 grains of a certain powder and are satisfied with 24.1 to 24.14 or 24.12 it's less tedious. I'm not sure I'd want it as my only scale but it is very nice and accurate.
I leave mine plugged in 24/7 but turn the display on-off. Ready to load with only having to hit tare. I do use check weights to verify as I do on my other scales. Mine does not drift and works perfectly with the supplied 120 V power supply. Mine sits under a 4 ft. cheap fluorescent light with no effect.
For weighing every powder charge I kind of prefer my Pact Precision with only one decimal place. If I trickle to where the display just changes to the next tenth it is nearly exact when comparing the weight on my Gempro 250.
The GemPro 250 is a good scale and worth the money. It is capable of weighing one small stick of extruded powder and that one small stick will change the 2nd decimal place.