Hi Tracy, There are a heap of mattresses out there which all have different claims. Some with credibility and some without. From the feedback i receive and my own personal experiences the biggest risk is purchasing something to soft. It is very easy to soften a bed with an overlay but extremely difficult to firm up a mattress if too soft. As such i recommend a base model mattress from a reputable producer. There is no need to spend any more than $500-$1000 on a mattress and base ensemble and then you can get an overlay to suit your comfort needs. That way you can change the overlay if needed without having to get a new mattress. Hope this info is of help and happy to chat further at anytime if you wish. Warm regards, Brett. 03 8585 6685