We recently bought this mattress after having a pillow top mattress for years. We were worried that we would not be able to get used to this Therapedic mattress because it is quite a bit firmer than our old mattress. The first night we slept on this mattress, my husband and I woke up with stiff backs. Our bodies literally hurt. I have to say, I was concerned. The second night, was a whole different story. We both commented that we had the best sleep ever and we felt so refreshed. We have now had this mattress for over a month and it literally has been a blessing to our aches and pains from our sagging pillow top mattress. This bed literally forms to your body. I would highly recommend this mattress and the Therapedic brand. Comfort The bed is firmer than most, but my husband and I feel that the firmness of the mattress has made our body feel so much better. Durability Our old bed would squeak all of the time, and we never imagined it would be from the mattress, however with the new mattress we hardly notice any squeaking, the bed is heavier than our old mattress.