Got the mattress delivered in box, once I cut it open it started to expand immediately. Gave it 24 hours before sleeping on it. This is my first memory foam mattress so I was nervous I would hate it. It took some time to get use to but I slept through the night for the first time in ages and woke up without hip pain. I’m still adjusting to the memory foam .... when you sit on it or plop down it’s not the bounce back effect of a traditional mattress that’s the only thing I need to adjust too other than that I love it.