Hi db729,
Outside of your testing for PPP … a mattress is only as good as the quality of the materials inside it so if you are considering a SilverRest I would make sure you know the quality of all the materials and layers inside the mattress. You can read a little more about SilverRest in post #4 here and the links it includes.
I would never buy any mattress where you had to use a “gut feel” about its quality and I would always want to know the specifics of all the layers inside.
Phoenix