Hi bggarric,
You can find my thoughts and most of the specs on the Sealy Optimum lineup (including the Radiance) in post #48 here. Like all the major manufacturer mattresses it can take some digging to find some of the specs and none of the retailers that sell them even seem to care that they have no clue about the quality of the materials that are in the mattresses they are selling. In the end though, finding all the specs for major brand mattresses just ends up with the same “poor value” outcome for the time and effort it takes to find them … but at least it’s nice to know what you are testing when you can.
Some of the better options I’m aware of in the Charleston area (including Charleston Mattress and Charleston Bedding) are in post #2 here.
Phoenix