Thanks, Phoenix–I am trying to absorb all the info. The reason the simplified choice brands were appealing was due to lack of time to shop (but look, now I am taking time), low price, and also desire to be able to exhange painlessly if it did not work. Since I have had such a negative experience with the Leesa, I am obviously concerned that any new purchase I make online have a long trial period (for a bit I was blaming my new back pain on a kayak trip, but it was now obvious that this is not the case) and an easy, preferably free, return policy. I am looking at the list of memory foam mattresses you have here: https://forum.mattressunderground.com/t/memory-foam-mattress-help
Could you telll me which off these offer such policies?