I have been using the king-sized version of this mattress and bi-fold box-spring in my guest room for the last 2 years and all of my family and friends love it. Every single one of them tells me how comfortable this mattress is when they stay. It is a very firm, supportive mattress, even after 2 years or regular use.

I plan to buy a the queen set for my own bedroom very soon and my mother plans to buy one soon as well. 

If you want a softer bed, put a 4-inch memory foam topper on it. The combination of firm support of the mattress and softness of the memory foam will make it feel like you are sleeping in a cloud.