I am very pleased with this mattress. It took some getting used to.
Having slept on it for 3 months now, I can feel a difference in my back. The support it provides is excellent. It is unfortunate that I couldn't try the mattress before buying, but based on the description from Dormeo, I went for it. This mattress feels as good as other well known and more expensive memory foam mattresses.
One negative is that there are no handles on the sides of the mattress to enable rotating it. So it is difficult to hold it to rotate.
It comes rolled up, and then you open it and roll it out. But if I had any reason to return it, i don't believe i would ever be able to fit it down the stairs again. Fortunately that is not necessary for me, but worth considering before buying.