I ended up in an accessible room at WL a few years ago (checking in the night before Thanksgiving, and the whole hotel was full) and it had a flip down seat. Little did I know at the time I checked in (thinking it was a shame to waste an accessible room on me) I was coming down with the fever and chills flu. That flip down seat was a lifesaver for about three days when I was too dizzy to stand for more than a few seconds at a time, but really wanted a shower. I don't know what I weighed at that time, but I know I was wearing a 26/28 in clothing sizes, so I was probably pretty close to that 250 limit, or maybe even over. It seemed very secure.