Hi Jewels,
Your careful and objective testing (using the testing guidelines in the tutorial post) along with some guidance from a knowledgeable and experienced “guide” (such as Marc) is the best way to assess whether a mattress is suitable for you in terms of PPP. I would also keep in mind you can always soften or change the “feel” of a mattress that is a little too firm with a topper or mattress pad but it’s much more difficult to make a mattress that is too soft any firmer because this would normally involve removing and replacing the foam layers that were too soft. As you probably know … I think very highly of Marc and Buis Mattress and their quality, value, and service.
It wouldn’t be the innersprings that are sleeping hot (innersprings are very breathable) but the foam layers, materials, and fabrics that are on top of the innerspring that are closer to your body. There is more about the factors that can affect sleeping temperature in post #2 here.
What you “feel” when you lie down on a mattress initially is generally more about the comfort layers than the support layers of a mattress so it’s possible that the comfort layers of the continuous coil mattresses you tested aren’t “right” for you.
I certainly don’t agree with this. The name of the manufacturer on a label means very little because outside of how well a mattress matches your specific needs and preferences in terms of PPP … a mattress is only as good as it’s construction and the quality/durability of the materials inside it and all manufacturers make better and worse quality mattresses that use better and worse quality materials. For me … the transparency of a manufacturer (or a retailer) and your ability to find out the specifics of what is inside a mattress you are considering is much more important than their name. This article includes a little more about the top 15 manufacturers in the industry and the “odds” that you will be able to find out what is inside their mattresses which is much more important than their name. With licensee brands such as the ones you are mentioning then the transparency of the factory that makes the mattresses in your region and their willingness to provide specs to their retailers would be even more important than the brand name as well since each of them may make different mattresses in different areas of the country even though they have the same brand label.
Phoenix