I’ve only slept on it a few times so far, but I love it! It’s exactly medium firm supportive enough for my back, but soft enough on top to be comfortable without sinking too much (I’m 5’6” and 150 lbs.) I prefer to sleep on my back, but the few times I decide to roll onto my side it’s comfortable enough for that, too. So far it’s a good purchase - I’m pleased!

Edited to add after sleeping on this mattress for about 2 months Taking off one star because the edges collapse a lot when you’re near the edge of the bed, and you can also feel an occasional spring. Feeling the spring doesn’t really bother me and it’s not too noticeable, but I’m not a fan about the edges collapsing as much as they do. The medium-firm support is still great and I’m very comfortable sleeping on this. It’s a decent buy for the price point. But if I need another mattress in the future I will probably buy a different one.