I own a Soehnle Style Sense Safe 100 scale and it feels like it's a quality product. Also, the German brand Soehnle is reputable to my knowledge.
The thing is, I recently discovered how the brand tricks the users into thinking the scale has perfect measurement exactitude. This is not difficult to notice because when using it to weight the same thing several times during a short period of time, it is strangely always spot on. So, based on my observations, I presume this is what the software does to trick the user:
1. When using it the first time, it stores the measurement of let's say 70 kg.
2. If it's used to weight the same thing several times in a short period of time, the measurement is performed as usual but just before displaying the final result, the previous stored value of 70 kg is recalled and showed, tricking the user into thinking, the scale measured the same.
3. If the scale detects that it is being used to weigh something that differs a certain amount (maybe 500 g more or less) than the last stored measurement, then it forgets that stored value and show the real measured one.
4. After some timeout that I didn't test (maybe 5 min, 1 hour, who knows...) the scale, as in point 3, forgets the value stored and performs a 'real' measurement again when it is used.
One can test the above by using it with a object A, then with an object B of different enough weight, and then back with A. In the last try, Object A will almost for sure show a drifted result, maybe by 100 g, 300 g or even 400 g. Now we are seeing here the truth.
That's all, I though it was interesting to share this. To a common user, this not only would be unnoticeable but also, will leave an impression of a wonderful product that always measures the same. However, not everyone can be tricked so easy.
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