However, it is like getting on Amazon - not to give so much credence to the reviews. On the mattress you can sleep (even if this is just on the floor), it is in spite of its hardness very comfortable, the smell goes slowly day by day over. It's really not often suggested as here. For this, the price is great!
A star subtracted because the mattress but considerably harder than specified, otherwise a strong buy recommendation!
--- UPDATE ---
There are now four weeks have passed and the smell is gone. It should be noted that I have not even turned the mattress to ventilate. So this is - as expected - no problem.