The bed came in a box, mattress vacuum sealed and rolled.  She weighs a lot!  I managed to bring it up 4 flights of stairs by myself, using a flipping technique, and lots of leg press. As I set it on our platform bed, it immediately took shape after the cover was removed. I didn't experience that chemical scent/smell mentioned in other reviews. The bed is supportive, mildly firm. I sleep well and wake up with no back pain anymore.  I'm very satisfied with this purchase!