I was sleeping on an old conventional mattress and after doing a bit of research, I landed on GhostBed.
The bed is nice and firm, but still has a nice elasticity. It has helped my lower back pain immensely. Very comfortable and affordable. A highly recommended purchase!
It was my first mattress in a box and I was impressed by the quality. However I do now know if I will be keeping it due to it being a little on the stiff side