Our new bed is such an upgrade and it has held its shape. I really like that it has fibers enhanced with silver to provide antimicrobial performance and moisture wicking. I still recommend a mattress protector to protect your investment. Don't let the name plush get you. It is not like a cloud that you sink into and can't get up. It doesn't leave a bit indent where you laid. It is a relatively medium firmed mattress, in my opinion. It has been great.  It has great support and keeps it shape. All very important.