When the headband indicates that I had bad sleep, it always matches how rested I feel. When the headband indicates that I had good sleep, it doesn't necessaril

When the headband indicates that I had bad sleep, it always matches how rested I feel. When the headband indicates that I had good sleep, it doesn't necessarily match how rested I feel. However I don't think the latter point is because the device is giving me bad readings. If you don't _consistently_ get enough high-quality sleep, you won't feel well rested.