They test you on a computerized machine to see which mattress you need.  We fell for the gimmick.  It is true that you don't have any pressure point pain.  However, we both have back issues and this bed seems to exacerbate them.  You roll into each other all night long and I guess that puts extra stress on your muscles.  When my husband is away, I don't seem to have as many problems with my back; that's why I think it has something to do with how you roll toward each other all night long. 

 Definitely not worth the money - We would never purchase one again.