Hi KayDee,
I don’t know if you have tested this mattress in person to confirm that it’s a good “match” for you but when you can’t test a mattress in person then the most reliable source of guidance is always a more detailed phone conversation with a knowledgeable and experienced retailer or manufacturer that has your best interests at heart and who can help “talk you through” the specifics of their mattresses and the properties and “feel” of the materials they are using (fast or slow response, resilience, firmness etc) and the options they have available that may be the best “match” for you based on the information you provide them, any local testing you have done or mattresses you have slept on and liked or other mattresses you are considering that they are familiar with, and the “averages” of other customers that are similar to you. They will know more about “matching” their specific mattress designs and firmness levels to different body types, sleeping positions, and preferences (or to other mattresses that they are familiar with) than anyone else.
While I can’t speak to how any mattress will “feel” for someone else in terms of firmness, “comfort”, or PPP because this is too subjective and relative to different body types, sleeping positions, and individual preferences, sensitivities, and circumstances … outside of PPP the most important part of the value of a mattress purchase is durability which is all about how long you will sleep well on a mattress. This is the part of your research that you can’t “feel” and assessing the durability and useful life of a mattress depends on knowing the type and quality of all the materials inside it regardless of the name of the manufacturer on the label so I would always make sure that you are able to find out the information listed here so you can compare the materials and components in a mattress to the quality/durability guidelines here and confirm that there are no lower quality materials or obvious weak links in a mattress that would compromise the durability and useful life of a mattress and would have a very high risk that you would need to buy a new mattress much too quickly relative to the price you paid.
As you hopefully know from reading the previous links … latex is the most durable of all the foam materials so there are certainly no lower quality materials or weak links in your mattress that would compromise the durability or useful life of the mattress.
While the price of a mattress is certainly one of the more important parts of the “value” of a mattress purchase … there are many other parts to the “value” of a mattress purchase as well and unfortunately there isn’t a “formula” that can be used to assess or “calculate” value because there are so many different variables and criteria involved that may be more or less important parts of each person’s personal value equation that may be very different from someone else. The “value” of a mattress purchase is also relative to the other finalists you are considering or to the other mattresses that are available to you in your area or online (if you are also looking at online options). There are many reasons that a mattress that may be “good value” for one person may not be worth considering for someone else.
I don’t know the blend of latex that is in the mattress you are looking at or the layer thicknesses but assuming that the Dunlop layers are 100% natural and the Talalay layer is blended and all the layers are 3" thick and that it has a wool quilted cotton cover then there would certainly be other similar mattresses that are more than you are looking at and there would be others that are less as well.
Phoenix