The model I got doesn't seem to be on their website any more. It was basically an extra-firm, without the 3-zone thing. I sleep about 1/3 on my side, 2/3 on m

The model I got doesn't seem to be on their website any more. It was basically an extra-firm, without the 3-zone thing. I sleep about 1/3 on my side, 2/3 on my back, and occasionally on my stomach (at least on this mattress -- can't stomach sleep at all on innersprings or memory foam). For side sleeping on this thing, I strongly recommend a good thick pillow. For more reference points, I'm a fairly small and light person, and grew up sleeping on foam mattresses that most people would consider rock hard, so this is reasonably soft by my standards. That said, in the 5 years I've had it, it's converted two boyfriends (both of whom weigh at least 50% more than me) to foam mattresses. One bought the same mattress but added a soft 2" latex topper (which is great for side sleeping but was too soft for me for back sleeping); the other got a Casper (which I found soft and saggy and a little sludgy by comparison, but is still waaaay better than innersprings). Both swore they were never going back to innerspring mattresses. If you do get a foam mattress, make sure to put it on a platform or slatted bed rather than a box spring. Whatever you decide, good luck, and sleep well!