Purchased a sensa latex mattress about 4yrs ago.  Best sleep and pain free morning in ages.  Only one problem, it didn't last.  Aftet 2yrs it devloped a bad indention.  Returned for replacement, happy camper.  Only problem, it did it again.  This time they said my mattress was no longer available so I could pay $500 and get an upgrade(pair of twin xtra longs), but they weren't in stock to try out.  They then sold me on memory foam.  Been sorry every since.  Question, how would a latex pad work on top of the sensa pedic majestic(firm) mattress  work out?  How thick, and what weight?  Your expertise is appriciated.