Hi Jomaco,
You can see the quality/durability guidelines I would suggest using in post #4 here to make sure there are no weak links in a mattress. In the case of this mattress I would want to know the blend of the Talalay latex (100% natural or blended but this is more for comparative reasons that quality/durability reasons) and the density of the polyfoam encased walls (1.8 lb or higher polyfoam is a good idea if you sit on the edge of your mattress). I would also want to make sure that the thickness of the layers and components added up to the thickness of the mattressto confirm that the information you received were all the layers in the mattress (including any quilting materials in the cover). If your mattress only includes the Talalay latex and the pocket coils and the polyfoam edge support is a suitable density then there would be no weak links in your mattress in terms of durability and it would certainly be well worth considering.
Phoenix