This mattress has been AMAZING! I took a few weeks to write a review because I have ALWAYS been leery of the bed in a box thing. I was so leery I kept my old mattress in the hallway just incase. Once the box arrived we opened the up and let it set for 12 hours! Mattress expanded nicely and has been AMAZING! Our previous mattress was over 20 years old and we were in serious need! I’m excited to see how this mattress holds up over time!