Seems super accurate. Dropped 3 pennies on it, the individual readings add to the total reading, the readings are repeatable, and the pennies are published weight (2.5g) (the shiny ones) or a little heavy (the corroded, dirty ones). Doesn't matter which corner you put the pennies on.
Might work for reloading. Great for model rocket parts or the whole assembly.
When my Panasonic microwave failed 10 days before Thanksgiving, I wondered if the problem could be something simple like a door switch or a thermal breaker. After removing about five screws and sliding the cover off, the problem was instantly obvious, a cracked case on the door switch caused weak spring force on the switched connection. In this case I also needed to replace a spade lug and some electrical tape available at a local auto parts store. But the switch had to be shipped, and that only took about four days-- Thanksgiving was saved, for less than $10!