I don't know anything about mattresses and the information you get online is contradictory. So I went to Macy's and tried every mattress there. For some reason the iComfort Guidance stood out and I kept going back to it. I spent more than I had planned but I'm glad I did. I've had it a few weeks and my lower back pain has improved. It is firm but I find it very comfortable. Of course this is all subjective but I'm very happy with it. I'm also glad I didn't buy something online without trying it.