I'm a firm, no-sink mattress kind of sleeper—I typically hate being "hugged" by memory foam. But, I also have lower back pain and big hips that (I think) throw my spine out of alignment when I try to sleep on my side, so I figured I needed more support & ordered this topper. The first time I laid down on it, I felt myself sinking into the foam and worried that I'd made a mistake, but after a couple of nights I adjusted and now it feels normal to me. It doesn't totally solve my problems, but I'd say it helps a bit. Since firmness is a personal preference, the only reason I'm taking off a star is because it tends to shift around over the course of the night and create "bubbles" where the topper has scrunched together. Easy to fix but looks a little sloppy. Otherwise, I recommend it!