The mattress didn’t fully expand.  The part that did expand, the corners are turned up.  Returning this item for a refund.  Please note I purchased this mattress because it had a 4.9 rating, while I did read some of the reviews it was only after did I realize the ratings are incorrectly listed.  Many of the positive reviews were for a mattress topper. I ordered a different mattress from Wayfair so let’s hope this new one is better.