This a very comfortable mattress. It is as firm as our previous mattress but does conform to your body, it is not like sleeping on a slab on concrete, so not too firm. So far it has held up well. My one concern was the “edge support” I have never ordered a mattress with it before. My concern when you sit on the edge of the bed the mattress definitely squishes down fairly far. But even though we both sit in pretty much the same place everyday, the mattress has maintained its original shape. Our previous mattress instead of the coils standing up they were in a horizontal position on my husbands side of the bed, felt like you were going to slide right off, but so far not this mattress. I think it is a very good mattress, well made and a great deal. We left it for 48 hours after unboxing it, but was comfortable as soon as we started using it.