I have had this mattress for 14 months, so my review is based on over a year of sleeping on it. When I first received mattress it was great. However, the mattress began sinking after about 9 months. For the last 5 months, I wake up every morning with aches and pains from the sinkage. I find my self having to sleep in different corners of the bed and with different orientations to find a firm spot. Very disappointed, would like to return this.