I have been reading these threads religiously...and have not seen any mention regarding the comfort of the beds on the Wonder. Since DH threw his back out on a concrete slab we had to sleep on while in Mexico...we now take along an aerobed in its own suitcase when we travel....just in case!! Sometimes we need it...sometimes not. Has anyone with back problems had any problems with DCL mattresses? (Frankly..I'd rather not have the extra suitcase this time) Thanks for everyone's help.