Hi BobinCA,
[quote]…foam above the 8" pocket coil is 1.8 lb density
gauge of coil is 15
your thoughts ? [/quote]
There is more about the 3 most important parts of the “value” of a mattress purchase in post #13 here which can help you make more meaningful quality/value comparisons between mattresses in terms of suitability (how well you will sleep), durability (how long you will sleep well), and the overall value of a mattress compared to your other finalists based on suitability, durability, and all the other parts of your personal value equation that are most important to you (including the price of course and the options you have available after a purchase if your choice doesn’t turn out as well as you hoped for).
While I can’t speak to whether a mattress is a good “match” for you in terms of comfort, firmness, and PPP (Posture and alignment, Pressure relief, and your own Personal preferences) … if these are the only two materials in the mattress and there are no “missing layers” in your description then there would be no lower quality materials that could compromise the durability and useful life of the mattress relative to more average weight ranges (around the lower 200’s or less).
If you are confident that it will be a good “match” for you (or if you haven’t tested it in person then you are comfortable with the return/exchange policy and any costs involved to lower the risk of making a choice that doesn’t work out as well as you hoped for) and it also compares well to the other mattresses you are considering based on suitability, durability, and all the other parts of your personal value equation that are important to you (including the price of course) … then it would certainly be worth considering.
As an example you can see my comments about the Aviya mattress in post #25 here which has the same materials and components as the ones you listed.
Phoenix