How about a "BAD" night sleep? Well in that case the total score would be low and the Withings Health App will try to explain to you what exactly happened.

Since we had in our hand a Samsung Galaxy 3 watch we made a quick comparison between products that supposed to monitor Sleep.

We monitored two days with the same person wearing the Samsung Galaxy Watch 3 and sleeping with the Withings Sleep Analyzer:

As we can see, the two systems have totally different stats and measurements and of course overall night score. From our point of view, the Withings Sleep Analyzer was very accurate, since we didn't slept very well that night. Later this day we also had a nap and again there were some differences. Note that the Withings Health Mate software doesn’t analyze the nap measurements (maybe this should be fixed in future releases)

The next day we also measured side to side. Again we can see differences in night score and in measurements but not so high this time:

The nap sleep at the same day has similarities:

Users can also view (less detailed) measurements/scores from the web interface of Withings.com.