Very firm and lovely mattress, I have a slipped disc in my back and I have been sleeping like a baby, the mattress is on the thicker side which I think helps really well. Would recommend to let the mattress sit for 24 hours so that it can expand properly, would also recommend for two people to move the mattress but it is fairly easy to move, be mindful that as it is a super king that it may not fit through all doorframes due to height when unpacked.