Earnings after several nights is clear: It is much more relaxed on the sofa bed, back pain no trace. The edition has solved my problem.
For frequently mentioned odor problem: The support smells clearly audible in fact, myself do not mind the smell and I also feel that this dissipates over time, or at least significantly reduced. I can imagine that very sensitive noses become annoyed - I personally had clearly expected something worse and was pleasantly surprised so far.
Whether the requirement is an excellent shelf life, I can not judge. Guests Sofa edition it is naturally not in daily use.
For space: Bundled they can, for example similar in a niche. "Disappear". The 7cm variant is naturally not so delicate that it fits into any small gaps. Still, I would always advise to slightly thicker variant, the problem of the possible "through chaise longue" strikes me here is significantly reduced.