We have been sleeping with the king size for a month. Two stars for easy ordering and delivery. Zero stars for the matress. Be aware this matress is not for anyone over 250lbs if you expect the extra firm to last. The first week was great for the back, but the amount of foam on the top will eventually give in and there is NO firmness left. The sides of the matress are not firm and the foam squeaks. You will roll off easily if you are not careful due to no seams. Our back problems are back due to sinking into foam, which radiates heat all night. The coils seem non- existant at this point. We will try to return it as this is not a traditional coil matress, but a foam matress.