Disc Troubles, Sunnyvale, CA
This is definitely firm, at first you might go "I made a mistake, I should have gone medium". But it softens up pretty quickly to the right point. As someone with multiple herniated discs, this is so far the best mattress I've tried. No ache in the morning when I stand up, which was usually the problem with my old mattress. It's comfy, not terribly warm (compared to what people were telling me), and it has just enough give to relieve pressure points that other firm mattresses create.