This is our second memory foam mattress from overstock. The first we ordered was a 10 inch mattress for the top of a daybed. This 8 inch mattress we purchased for the pop up trundle that goes under the day bed. This mattress works well for that purpose. It fits the trundle perfectly and still slides under the bed. However, this is a very soft mattress. The other bed we had ordered was much more firm and had that true memory foam feel. This mattress is more like regular foam. It doesn't really form to your body and give you that weightless feeling that true memory foam does. It took no time at all to pop into its correct shape after opening. The smell wasn't too bad, but did take a good day or so to dissapate. I would reccomend this mattress for bunk beds or trundle beds. I would not reccomend it if you are looking for a high quality memory foam mattress for everyday use.