The mattress arrived in a huge sac, like a giant rolled up sleeping bag. Unpacked, it began to rise and shape itself on its own. After a few hours we just had to test it out on our new bed and were all pleased with the softness of it. My daughter has been wanting a memory foam mattress and she loves the feel of this. Yes, it had a slight scent, but not overwhelming. The scent does diminish quickly though and a few sprays of Febreze fabric spray will help. I am using this mattress with a full sized platform bed we just bought from O-stock and it fits all corners nice and tightly.