We purchased two full mattresses for our teenagers. The mattresses were delivered before the day it was expected, which was great. We immediately removed the mattresses from the boxes and also from the vacuum plastic bag, ingenious package by the way, and then we strictly followed the recommendation of waiting 48 hours before laying down on the mattresses. Our teen kids loved it. This is the third night they are sleeping on the mattresses and so far no complaints. However, its important to inform you that the mattress is really bouncy, and this is the only reason why we are giving 4 stars. We think this mattress doesnt work very well for adults or for couples.