I got a replacement mattress as the first one was lumpy out of the truck. The second one appeared to be good so since I was moving in a month I kept it in it's packaging and left it in my garage till moving day. I put it up in my room and it was good for about 2 months. Now it is just like the other mattress it replaced! It has a huge sink towards the end of the mattress. A huge lump on one side in the middle. I have contacted Beautyrest and no response at all. I have sent them several photos as well showing the lumps.