Until the finished mattress, it is a bumpy ride. I have thought long before buying, because I could in Ger.-speaking network find no independent assessments; not without a link here. My wife then took an in rus.-language network, the state Consumer Protection of the Russian Federation. This said that this mattress ansich was good but would need up to 1 month for airing. We have finally decided on this purchase, and so it was. In the bedroom, unzipped this mattress gave off a petroleum-like odor, so she came straight to the balcony. (Caution, the coating is extremely sensitive and pulped immediately when he comes on the balcony with exterior plastering in touch) Due to weather conditions, she came to 1/2 day back inside and stayed in the living room. The smell caused at breakfast the next morning headache. (The living room during the day then also my office) The mattress came up to the attic - very spacious, clean and a little drafty. There they remained now another 2 weeks. Then they stayed for 1 night in the living room, as it has again "vented some steam" when introduced from the attic in the considerably warmer apartment. (Season Due was the attic also quite cool) Until that time, I did not know if I will not return the mattress want. On the bed we were ultimately very happy but there are and now. 1 star deduction there is that - expressed unvarnished - the last step in the production process will be outsourced to the customer. This applies perhaps even to many of the current generation mattresses. As arises halt the question what makes someone who now has no weather-protected balcony available, spacious and clean attic or at least a spacious and large corridor and a very good relationship with the neighbors who share this? Since the coating of the mattress does not emit a stench and sensitive than the Schaumkstoffkern, we have taken it out to air. According to conditions of the mattress by lying with this weight loss is, however, a result of improper handling may void the right of return. And there is now the 2nd star deduction: Since coming Terms therefore after purchase, which were included neither before buying in the product description, can still be taken for granted.