The scale does what it should. It is most likely designed the mass of eg gemstones directly to determine: drauflegen and read. For "dropwise addition" it is not as accurate as it can be a slight drift. Then you should not take too seriously the last digit. Who wants to read really 0.1 g precisely with the addition, already have to take some extra cash in hand.
The hard plastic hinged closure is practical, you can not move him, and the balance is thus protected in the closed state. The balance is also about the handling by 13-year-old well.
