Given the task definition and input, reply with output. In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.

First of all, I ordered the 12" King size and waited 48 hours before sleeping on it. It did NOT expand to 12 inches! It was 10" on all sides though,not like some people's reviews that said it was uneven all around,or received moldy or smelly beds. Mine is clean as shown in the picture and I didn't notice any strong smells,just a faint odor that went away after a day or two. I took a picture after it stopped expanding,and while the covering was slightly loose in one area,the bed looks pretty. I have back problems and this mattress has NOT helped. I purposely waited to write this review after sleeping on it for a week. One review said the bed felt soft and firm at the same time and I wondered how could that be? I don't know but she was right! If you like a firm mattress then you'll probably like this,though some said it gets softer as time goes on. I personally have been having back pain every morning so I will be adding a soft foam topper to put over it! I'm a senior and my daughter and I (mostly my daughter) put this on top of the Xl Twin box springs that came in a King frame I ordered. So after having to get rid of my old bed and all the money I paid for a new King size frame, and new box springs and the bed in a box I was not going to donate it and get a receipt like I've read that Zinus has you do in order to get a refund!!! I read from one review that a guy called Amazon and they helped him so I gave it a shot! I explained that I didn't want to return the bed, but since I was paying for a 12" bed and my bed is only 10" that I should get a discount and that's what they did! They adjusted my bill and I am VERY happy with AMAZON! I will update this review after I buy my new topper!
Not 12" King but Amazon was great and gave me a discount!