I read all of the reviews and debated over ordering medium or soft. I am a single 130 pound female who LOVED my 4" memory foam topper. I was upgrading bed size and decided to go all out and get the memory foam mattress instead. What I loved about the topper is the way you sink into it and it's so soft. So I decided to go with the soft firmness. It is not soft. The edges of the bed are great, but the closer you get to center the harder it gets. I would say it's a medium to firm. I guess that's the risk you take when ordering a mattress online. I have waited in out, I have owned the bed for 4 months and still no better. I'm really disappointed. I wish I had just gotten a cheap king mattress and gone with a topper. Now I can't even put a topper on it because it's 15" already and no sheets would fit over it if I added anything. It was a HUGE disappointment and now I'm stuck with a medium/firm bed. I'm not sleeping as well either. If you think you want a soft mattress do not order this one. I don't think the company is capable of keeping it consistent at the soft level.