This mattress is one of the best ones that I have used. It is comfortable and relieves back pains. Not only that but it is really soft and sturdy. As I mentioned before, the mattress is sturdy in the sense that it won't break down, yet it does seem to be developing a cavity of some sort. It may not be noticeable when off the bed, but I can definitely feel one start to form when I lay on it. Having had experiences like this before, I usually rotate the mattress to lessen the load off of one side. I will say that this gets tiresome after time and is just really inconvenient. Even after all this, I feel like this mattress is way above the quality of most brands out there. For me though, I would not recommend this due to its hefty price tag, although it might satisfy others needs out there, I just don't feel that this brand is the best for me.