I didn't know what to expect with this mattress but I was pleasantly surprised by it. It really is a medium between firm and plush (more firm). It's a thicker and sturdy mattress and may not require a box spring. I'm skeptical of mattresses but it has really helped my back and neck area. I'm no longer waking up with any pain or stiffness. And, I can only attribute that to this new mattress. I haven't experienced any dipping from lying in the same spot. It's a really good mattress and a great fit especially for my back issues.