We had sofa beds (so the usual 200-400) and every imaginable kind of folding mattress (not very cheap, or the Thai rolled mattresses, but the Sun from 40-60) and is NOT comparable to this.
Is very stable to me in the long run (as a real bed and especially Tempur mattress usual) but too hard. Because we use only but anyway as a guest / spare bed for a few days ...
One side of the mattress has a, about 5 cm thick pad or Viscoelastic Memory Foam (a very soft foam that adapts to the body, but always returns to the form). When so beds before making were feeling so one lies on the right side.
The only drawback, the enclosure. Unfortunately, this is a very thin material, similar to cotton fleece (when you pull it, it quickly becomes brittle / thinner). To conserve I lay still sports mattresses and under thick molton or Waterproof fitted sheets round, on.
Every guest, even the little Weightier (see photo 120 kg man), are good, without sinking or durchzuspüren the cold from the floor and always to feel almost encouraging lying ground.
Otherwise you had indeed of the cheaper parts of at least 2 superimpose to even come close to a good feeling to have. Now all we need is a - this one: o)