Bought this January 2019 and decided to wait a little while to leave a review. Firstly, it’ll expand when you open and even get to its full size, but it takes a few days before it is FULLY expanded so give it time. Secondly, I never not have a good nights sleep on this bed. Lastly, you will have such a great nights rest on this mattress I promise. I am a stomach, and side sleeper and did lots of research before I decided what would work best for me and that happened to be a medium firm. Also does not leave a indent from sleeping on it in the same spot so many times.