We need a new king size mattress for our bedroom. Before making the investment for the master bedroom, tho, we decided to try out a queen size in the guest room (daughter just graduated college, moved out, and we let her take her mattress). We are frustrated with traditional inner spring mattresses and the Zinus memory foam came highly recommended. Although the version we bought is the "soft" side of the firm memory foam line, it is definitely quite firm. That is not a criticism, but rather, information in case you are looking for a "soft" memory foam. This is comfortable but not soft. I struggled a night or two with the firmness; after that, smooth sailing. I don't wake up through the night looking for a comfortable position and my back doesn't hurt in the morning. Great product, especially for the price! We are now getting ready to buy this version in king size for our room!