It works, but minimum weight is 0.5 gram, and you must put all the weight together: if you add or pour the measured weight by small portions, the scale works with a huge mistake. All additions lower than 0.5 g are simply ignored by the scale.
On the attached images you can see that weight is 0.0 g when 6 tandsticks are added one by one, but it is 1.1 g when they are added together. You can also see, that if i put 2 tandsticks (about 0.4 g) together at the same time, the scale still shows 0.0 g.
Otherwise it seems to be quite good: if i add the weight by portions larger than 0.5 g, it seems to add up well, without a mistake. It also shows good precision on test weights of 1 g to 20 g.
