I got this for my living room for several reasons! But I love it. I read the reviews on the mattress sizing so decided to go with 8" memory foam for bottom and the 10" super firm spring for top.  The 8" fit fine for the bottom but the 10" left a gap on the top. Since this is being used as a couch I will be putting the 10" on the bottom and ordered a 12" for on the top. Reason for moving the 10" is because memory foam sinks when I step down. Hope this helps someone. I attached pics. This is with the 10"