Thanx for the reply!
All the beds are pretty new, but I am starting to realize that this probably has to do with misunderstanding/comunication. In my mind, it's pretty obvious that the beds in question are beds for children, but can be, and have been, used by adults. Just comes down to expectations on the guests part, I suppose. I believe that my previous guests have had more realistic expectations in terms of comfort for adults using these beds. I have specified this better in my discription now, so hopefully this issue is solved!😊