Mattress arrived before th scheduled date. It is medium firm as described even if someone said in their review that it is too soft. Initially it was too firm for me, but after a week I'm getting used and eventually the filling is getting softer and comfortable. I returned my previous foam mattress because I felt it too warm at night. With this one i feel fresher and eventually it is much more breathable than a foam mattress. I'm a side sleeper and despite its firmness, i found very comfortable.