When we first got this mattress, we got the medium-firm. The edges were sagging when it arrived and it was so soft we immediately returned it and exchanged for the firm. Due to these issues the company did pick up and exchange free of charge. The firm is still very soft. After months of use, there are uneven spots (like sinking) but not enough to warrant the guarantee to kick in...….only enough to make for a miserable nights sleep. It does not sleep cool, as it professes and I am extremely disappointed. I would never recommend this bed.
Twin Falls, ID