I have been familiar with eggcrate mattresses previously from my hospital work. These were used for patients in order to avoid pressure ulcers for those very ill patients who could not turn themselves over due to their state of health. I am not disappointed in the product as it provided excellent support and a wonderful nights rest. However, I was disappointed in that when the packinging was removed, there was a good size stain on one side of the mattress. It appeared that prior to packing, it came in contact with some kind of grease material. Luckily, this stain was on the bottom side and my wife convinced me that we could not repackage it tight enough to get into the box to return it. I would normally have score this product an excellent but due to the stain and my inability to return it, I have scored it a good thinking that perhaps this is why the price was discounted on this product.