The stiffness is mid-to-hard-ish, which I feel very comfortable with. Memory foam feels a lot different from my previous spring mattress but it's in a good way. It deforms to fit the shape of my body and provides nice support.
Great office desk easy to assemble using a drill. Enough space to put 3 monitors for work at home use. The shelf is movable and I can put my projector on it. I can work while watching tv or playing games.