I LOVE IT!!  I was really a bit worried as this was the first time I ever ordered a mattress online.  I read a lot of the comments which were very positive so I took a chance.  Someone mentioned a smell, which we did not have with our mattress.  It was very cumbersome to get into the house, up the stairs, and to open up.  I was anxious to try it but waited the full 48 hours and then some so it could completely expand.  I have back problems and though I still awake after several hours I must say I sleep better with this mattress than I did with our older one.  I also love that it has such a long warranty.  I am very happy with my purchase!