Hi Elderblaze,
The only accurate answer to this would be “it depends” on the type and firmness of the polyfoam and/or on the type and firmness of the innerspring. In general terms it would tend be accurate but “generic” answers don’t apply to specific individuals or circumstances so the most reliable source of information about whether any online mattress is likely to be a good “match” for a specific person will always be a knowledgeable and experienced online retailer or manufacturer who sells that specific mattress.
The key here is “most”. There will always be exceptions where the innerspring fails for various reasons and it will also depend on the type of innerspring as well but this would be true in “most” cases. The “weak link” of a mattress is the upper part that is compressed the most on a regular basis and is most subject to the wear and tear of the compression forces that come from sleeping on a mattress and this is generally the top 3" to 6" of the mattress (depending on the specifics of the mattress and on the body type and sleeping positions of the person sleeping on it).
I don’t keep a record of all the specific mattress constructions that are available in the industry (which would be more than anyone could keep up with in a constantly changing market) but I don’t know of any that are made by the “S” brands off the top of my head. There would likely be some that are made by some of the "non “S” brand mid tier or smaller manufacturers that may be available in your area but you would need to check with the specific retailers or manufacturers that are on the San Antonio list or some of the other retailers that come up with a google search for mattresses in San Antonio.
I’m not sure what you mean by “top line” coil because the type of innerspring that is “best” for any particular person would depend on the person and on the specific construction of the mattress and I don’t know of any “rating system” that rates them in terms of better or worse because this would depend on the application. Their comfort coil line of pocket coils are all good quality pocket coils but but I don’t think that the Quantum Edge is their most expensive coil so it wouldn’t be their top line if you are using either coil count or price as your reference.
Again … I don’t make specific “comfort” recommendations because the manufacturer/retailer you are dealing with would be a much more knowledgeable and reliable source for this type of guidance about their own mattresses than anyone else (including me) … see mattress firmness/comfort levels in post #2 here.
It’s not that new and has been available in the market for years. For example Baybed (another one of the members here) has been making them for 23 years and there are probably other manufacturers that have been making them for much longer than that.
There are no weak links in the mattress (which is the only definition of “good” that I can speak to), it wouldn’t make any “crunchy” noise that I’m aware of, and latex and innersprings are among the cooler materials and components in the industry (see post #2 here for more about the variables that can affect sleeping temperature).
Yes I’ve seen it and you can see my comments about it here.
Phoenix