It's still a little stiff 3 weeks in but a king size is a lot to break in. I love the mattress and would absolutely recommend it to a friend. The off gassing is pretty overwhelming. Do not bring it inside your house for a few days. I did not have the ability to let it sit in a garage or something for a few days and it made my stomach and head hurt for days with my apartment windows open and fans blowing. It was about 5 days before I could sleep on it. 3 weeks later I do not smell the off gas unless I put my nose to the mattress. I think it would be a much better experience if they would let their mattresses off gas before they send them out.