Hi Sdot,
The partial specs you provided don’t have any obvious weak links in terms of quality or durability (the memory foam is in the medium density range and the polyfoam is on the low end of the good quality range).
Hopefully you have tested it for PPP and it’s a suitable design. It would also be helpful to know the rest of the materials or components though because these are only some of them.
The value would depend on your personal value equation and on how it compared to any other “finalists” you were considering.
Phoenix