We have the Bodi-Pedic which is the same thing, they are both visco elastic memory foam. We bought ours from QVC and I have to say, I LOVE IT!!!!
We have the pillow top version and I hate to get out of bed because it is so comfortable. I have a broken disc in my back and I used to wake up in pain every single morning. I also used to also be a very restless sleeper, waking up several times a night and constantly shifting positions. Now, I sometimes wake up in the morning in the exact same position I fell asleep in.
It has really been a Godsend for me, and my husband loves it as well. Our mattress has no kind of smell whatsoever, but I did buy a memory foam pillow at Kohls that had a funny smell so I returned it.
It is, however, a very thick and tall mattress, so it took a little getting used to getting in and out of it.