I must say that the mattress arrived promptly but I was a bit surprised to see it wrapped tightly like a bundle. Anyways, I left the mattress open for a few days for it to gain its firmness. As instructed, I had the mattress rest on a solid foundation frame that has center support rails. Before I get into my experiences with the mattress, I must say that I had decided to buy a memory foam mattress because i was having back problems and was looking to get some relief via a good memory foam mattress. About my work situation, I have to work... read full review »