We purchased the mattress following the loss of furniture from Harvey. We bought a queen size so it can go in our guest room to try it (rather than in our bedroom, which needs a king. So far we like the mattress and find it comfortable, although not quite as nice as our previous one (a much pricier Stearns & Foster). We think it was a very good value for our guest room, but may purchase a different mattress for our king bed that is a little more plush.
at this point that would be my assessment (i have had the mattress for 2+ weeks). I am a big guy (300+lbs) and I am still not sure it gives me any more support than i had with my inner-spring mattress. I does seem more comfortable as i get more used to it. So it would be better to ask this question again in a month or so.