Instruct: Classify the given Amazon review into its appropriate rating category
Query: Beware may not fully expand!!

Really disappointed because this mattress is so comfortable for a memory foam. Almost has a pillow top. Unfortunately I had to refund and amazon was out of stock. I ordered the 12 inch and after 2 weeks mattress only came up to about 8 or 9 inches. Cover on mattress is sagging since it is not fully expanded and the corners are starting to bow. Memory foam in cover is also not straight so mattress sags on one side. I really like the softness on top, but with it not expanding there was no way I was keeping a defective mattress.