Now after almost 2 weeks I can say the following:
I sleep so well how long no longer
In the morning I am more relaxed than I was before
Until now I had less problems with back pain or neck pain (as I have arthritis, I am often at night or in the morning woke up with severe pain)
The bed is comfortable mistaken, it is like a dream in it.
My husband rated it as follows:
Good sleep
No more back pain
Great sunbathing experience.
What we both noticed right the first chairs:
Especially in the area of the lumbar / hip it felt as if the muscles would relax as if you were practically in bed "sink". It's incredibly hard to explain, but it is incredibly pleasant.
That's why from us 5 stars and thank you very much for such a great bed especially in this price range :-)