This tatami was going to be our "backup" mattress for when we had to "hunker down" during a winter storm by our fireplace.  I have been sleeping on it since it arrived and my back has never been better!  It also folds up nicely into a reading lounge seat in my bay window, so you get some extra seating as well.  It's also given me a meditation & pranayama "nook".  Great buy.