I bought two of these mattresses for a well-known children's manufacturers bunk bed. I agonised over spending an extra £200 on the pair, over the top-of-the-range pocket sprung/foam mattresses from the same company who manufactured the bunk. I really wanted to have a 5 star product. Unfortunately the beds are so firm and heavy it is proving a real mission to change the sheets. Also, the mattresses have no side 'give' and are SUCH a tight fit into the bunk frame than I have to squash it in and scrape my knuckles in the process. I wish there were perhaps a centimeter gap between the mattress and frame. The mattresses could also do with having handles on the sides to help manoeuvre around. The firmness is fine for an adult but I wonder whether it is too firm for a child's weight. They were advertised as medium-firm, and that they are certainly not. The tag on the mattress also says one should regularly turn the mattress, but as these have latex on top of coir, surely when turned the mattress will feel even more firm? Lastly, the company do not manufacture a 90x200cm protector and I was assured by email that the fit of a 90x190cm protector would be adequate...the elastic is so thick that it 'bows' the mattresses upwards. Sadly, my understanding is that the mattresses cannot be returned if not defective so we will have to get used to them, but I do dread every linen change. I wish I had gone for the bunk bed manufacturer's own mattresses, even though I would have had to compromise on my desire for an all-natural mattress. Such a shame.