My wife and I, before we married, got one of these beds each, thinking they were supposed to be the best thing since sliced bread. She got the cheapest one, I got the model that was a couple steps up, (supposedly).
When we got them, we figured it would just take a while and we'd get used to them and get ourselves "dialed in" on which number we should each use.
A little over a year later, our backs hurt more than ever, and we are going to get new a new bed. We actually sleep on our la-z-boy couches sometimes to make our backs feel better.
Rush and the rest of you who have...