I was at AKV Kidani last month, it was different than the one at BWV. It didn't pullout from the back, you had to take the cushions off and pull it out. I didn't sleep on it, my friend did so I don't know comfort wise if it was different.
Not sure about others, but OKW you remove the cushions and pull it out.
DD (adult) slept on it. HARD!! We called housekeeping for an egg crate and that helped.....we needed to call anyway because there was no blanket for it.
She doubled the egg crate on half the sleeper and then it was fine.