The results seem to me plausible. However, measurement differences arising partly within minutes of up to 0.3 per mille. The device is visually appealing and easy to handle. After about 30 measurements, the batteries were used up with me. But what really bothers is the acoustic signal at the end of the measurement, which is extremely loud and lasts at least 10 seconds. Too bad, so only 3 stars. Without the noise I would have given 4 stars.
