The foam really didn't expand very much so it's pretty uncomfortable after a hour or two, but it did expand enough that there's no way it would fit back into the box to return it.  It turns into a bed fine but it's not comfortable for that either.  Doesn't look like at all like the comfy puffy sofa bed shown in the pictures.  Pretty much stuck with this "Sofa Bed" that is not at all comfortable for even an hour of sitting.