DH researched it and we were considering buying one, but then we had the opportunity to try one out and we changed our minds. A friend of mine asked us to dog sit and stay in their condo for a weekend. Their bed is not that old, but we noticed there's a big dip in the middle. We thought maybe because the husband and wife were 2 different sleep numbers???
We weren't sure, but that scared us away from that bed. It wasn't comfortable with that big dip in it. It kinda forced us to each stay on "our" side of the king bed.
We ended up buying a queen Serta "Evia" which is Serta's Swedish Foam Mattress. We Absolutely LOVE it!! I can't say enough about this bed. It was about $1,800 and unlike the Temperpedic, this is a "high" bed which is what DH wanted. We loved the Temperpedics but thought they were too low.
There is no bounce to this bed. (The kids couldn't even jump on it!)it molds to your body when you lie down. It's SO comfortable!
We are very happy with our decision!