I'm an avid model airplane flyer and builder and use my fair share of two-part epoxy adhesives. I purchased a digital scale some time ago, but needed greater accuracy than my 0.1g resolution scale provided. I often mix very small batches of epoxy, from 1 to 6 grams. With mix ratios of 5 to 1, the second part, the hardener, can be as little as 0.2g in one batch. The 0.01g resolution this scale delivers really did the trick.
For the sub $40 price, the performance out of the box was quite good. I purchased calibration weights (class M2) which showed as 0.15% error on the scale as calibrated at the factory. Not bad. The calibration process is easy and uses a 100 and 200 grams to calibrate this scale. After cal, the readings were typically +/- 0.02g, which is what is specified by the manufacturer. Weighing performance was quite good for such an inexpensive scale.
Size-wise, this unit is slightly bigger than my iPhone. The buttons have a nice "click" to them, so you know they're being pushed. They're also plenty big for fat fingered people. The scale reads in grams, dwt, gn, and ct. In English, thats, grams, pennyweight, grains, and carats. The only missing item is ounces. I guess they only care about those who buy drugs, load their own ammunition, and perhaps mix glue :) For me, that's a minor issue. The other item of interest is that this scale's main display always displays in grams. The sub-display can be changed to the other formats, or to use the counting feature of the scale. For me, i'm happy using grams all the time. If you need the other formats, know that you're stuck with the large digits always in grams. Yes, i said it twice :)
Couple other minor gripes... the plastic quality. The outside of the scale and the display are made of soft plastic and scratch easily. In fact, there were plenty of scratches on my new scale when it arrived. The clear plastic cover is actually foggy. The display is backlit, but could be brighter.
I bought the scale to have something compact and affordable to mix epoxy. It does that job extremely well. Not the prettiest thing out there, but for the money, i'm happy with my purchase. Not five stars happy, but four will do....