Generally, for convenience, I can say that I have decided for the 5cm version as a compromise between the better portable 3cm- and probably a bit more comfortable 7cm variant. What actually turned out to be right choice. Also two weeks at a time I could well sleep on this mattress, the transport was also feasible.
The reviews that complain that they do not manage to curl the mattress again reasonable, I can not understand. When lining up not completely inept, which is actually not a thing ...
