i opened the mattress and left it on my bed for the day. that night my husband and i slept on it and we kept rolling to the middle. we should of definitely gave it more time to expand. but by the third day it was amazing. the best nights sleep in soo long. my other mattress gave me back pain and after a week of sleeping on this mattress i haven’t had any back pain at all! definitely worth every penny. you won’t be disappointed. it’s been over a month and i swear it gets more comfortable.