Hi FayH,
The information you would need to identify any weak links in the mattress or make meaningful comparisons with other mattresses is in this article. Unfortunately the information they provided is incomplete and doesn’t provide the thickness of each layer and the density of the polyfoam which is necessary to be able to make any meaningful comments about the quality of the materials in the mattress.
The better options and possibilities I’m aware of in the New York area are listed in post #2 here.
Phoenix