I bought this mattress for my granddaughter's bed.  Mattress arrived on time and is in delivered rolled up in a box.  When you remove the mattress from the box it's rolled in a plastic and the mattress is in a air tight bag.  I read several reviews on the mattress springing open, so when I removed the mattress from the box I laid it on the bed frame and carefully unrolled the outer plastic and then unrolled the mattress, which is still in the air tight bag, onto the bed frame.  After this I cut a slit at the bottom of the bag and let it slowly release the air the completely removed the plastic from the mattress.  I did not have any issues with it springing up all over the place.  It is a full 6" mattress and a little on the firm side but is extremely comfortable.  I would purchase this mattress again and would recommended it to any one.