I have a muscle disease and have found it hard to find a bed that doesn't hurt my muscles. I went with a firm bed as any softer I wake up sore. I LOVE this bed. The firm-ness is just right, not too hard, but not sinking in soft either. There is some bounce to the bed, so it wasn't as motionless as our previous memory foam bed was. The only other thing that we had an issue with was that it does not like our bed frame very well, it likes to slide out of place. I think the moving of it is because for a king it's actually a fairly light bed. My husband and I have used it for about two months, and we are both on the larger side, this bed has not sunken in and has no divits at all which has been a first for beds for us! Overall we both really love the bed and have had some of the best sleep in a very very long time!