We have slept on the ones at HHI and OKW.
HHI, no problem, a little adjustment the first night, but after that I slept just fine.
However, OKW was an entirely different story.
I woke up every 1-2 hours with my arms and hands numb, my legs felt bruised for a week. It was not pleasant AT ALL. There was little to do padding on the bed itself, and the frame around the mattress was very sharp, I had to be careful to not cut myself or scrape skin off the back of my legs getting in and out of bed.
Also, because of the now slick floors, putting the bed away is a pain in the rear end because it slides EVERYWHERE while trying to fold it away. There were 5 of us, including a 1.5 year old, so we had to put the bed away every day.
I would go back to HHI and sleep on the sleeper sofa in a minute, however, I would NOT go back to OKW and sleep on a sleeper sofa, it just wasn't worth the pain and suffering in the weeks following!