A very comfortable mattress while it as in good shape. Its only one sided but salesperson assured us just rotating not flipping it would still give us long life. It now has a noticeable visible sag along the edge in the center of one side approximately the same location where you would initially sit down on the edge before lying down or standing up when you get up. I had hoped to get more than 3 years out of it especially as this was not exactly the cheapest one of the selection. I will consider other brands in the future as I have had others and they held up much better.