So first off I have never owned a memory foam mattress before. My bed took about 48 hours to expand to about 90% capacity and then a few more days after I started sleeping on it for it to expand completely, the corners are the only area that took a bit to expand. It was a little uncomfortable for the first couple of days as my body adjusted to the mattress (which is definitely a good thing)! After having this bed for a few weeks now I’m absolutely in love with it! It’s super comfortable and I no longer wake up with back pain like I did on my old spring mattress. I hope that this mattress lasts a very long time!