I started to realize that my mattress topper was not going to completely expand a few days after I opened it up. I gave it about a week and then called the customer service department at Sinomax. Wow! Not only were they incredibly friendly but they really do stand behind their products. After a few quick emails to provide proof of purchase and to show the defects, Sinomax is sending a new mattress topper. I recommend this product simply because the company that makes it stands behind their word and their work. I look forward to more sleep filled nights as well.