Even thou we bought it few weeks ago, it has only been used for few days. It came nicely and air tightly packaged. Mattress itself has another cover. It took about 2 days for mattress to ‘fill up’ but the cover corners arent tight and have room ‘for more’. There is no nasty smell to it. Our teenager loves it. She’s about 125 lbs and says she loves how soft the mattress feels. For my 165lb body it is too soft and def hard to get out of but so far, no permanent ‘mark’ has been noticed. I will update the review as necessary.