Supplement with a star deduction of 4 stars so far:
The Moorgelkissen I had for 5 months 2-3x weekly, kneaded in use, always in the microwave on 3 min à 440 watts + 600 watts for 1 minute, pause again for 1 minute at 600 Watt heated. However, this procedure has the plastic sheathing endured no longer and has become brittle, ie the last warm-up has leaked me Moorgel. So I can not use pillows. Too bad that the fatigue comes quickly. Perhaps one should heat the pillow slowly and carefully, but I found that it was not really warm at a lower watt stage and would therefore have been also useless.