So far I have bought two different brand mattress from Great Offer Stock. The first one was for my husband and I (Comfort Dreams CA King) what waste of money: the support did not last, at the same time I bought this mattress Christopher Knight) for my daughter and ended up sleeping in it instead! This is an awesome mattress. the firmness doesn't give in and offers great body support especially if one suffers from neck, back, hip, and leg ache. Would buy a CA King if it was sold in that size!