This mattress is amazing, for real. I got the 10” because I like mine a bit firmer, and I was worried that it was a little too hard at first, but it definitely provides the exact right amount of support for me! For reference, I’m 5’4 170lbs and primarily a back/left side sleeper. If you sleep with a partner, this bed isn’t too hard for them either unless they prefer a super soft mattress; this one has very little sink. After opening, this expanded within 24 hours & only had a mild odor that faded within a few hours. For this price, you really cannot do better!