The mattress came all rolled up and I thought, "How is this going to expand to 10"?" Well most of it did, but one side stayed flat - it expanded to about 7". It also did not fit into the double bed frame that we had. It was too big. But that worked out okay because the side that didn't expand went on top of the frame (as opposed to inside of it) and leveled out the bed. The bed is very comfortable, and we didn't have any odor issues as others have complained of. The only problem was that the one side never completely expanded. I would recommend this mattress with the caution, that it may not be perfect, but it's comfortable and we made it work.