This mattress sold us when we were in Costco one day and sat on the sample that they had on the pile of boxes available to purchase. It was the most comfortable thing that I had ever sat on, so I decided to try and lay on it. It was heaven on a mattress. It is three inches thick, and you can can really tell while you are sleeping on it!
We brought it home, and it took a while to take out of the package, as it was vacuum sealed, and you were supposed to let it rest for 24 hours before using it. We did this, and than put it on top of our mattress the next day. It was a great sleep, and the most rested sleep that I had ever experienced.
The memory foam is grat quality, and comes with a cover that is the softest fleece material, very soft, and comfortable in case the sheet happens to come off. Very handy because you can take it off and wash it, too!
It fit very well with the bed, and like it was made for it!