Hi Warder,
I’m guessing you may mean the Reveal pressure mapping system?
To a large extent pressure mapping systems are often more about marketing than anything else. While they can be helpful to some degree … they certainly wouldn’t be a primary part of the reason I would choose a mattress (see post #2 here and the posts it links to).
I would also want to know the specifics of all the layers in any mattress I was considering and not just the density of the base layer (see this article) so you can identify any weak links in the mattress and to make more meaningful comparisons to other mattresses.
Phoenix