Correctly, however, is: The display has two different scales with different units. The easy to read, external scale measures in the unit "Stone" (which should be the one I've never heard of). The smaller, inner scale indicates the weight as usual in kg.
Therefore: Who hopes for a large scale, out of luck. The kg are small like everywhere and - if one is not exactly 1.60 tall and has eagle eyes - probably not so easy to read. As for the weighing accuracy, the scale you have zero occasionally, because the pointer also has a hysteresis (ie if / how it goes back to 0, depends on the previous weighing process from). However, this is at all scales of this type that. The accuracy compared to an electronic balance appeared to be well to give realistic max. can read in half a kg. Visually, the device looks good.