Questions about SelectFoam mattresses (and comparing foam mattresses in general)

I purchased a mattress about a month ago from SelectFoam. I can say that their mattresses are of good quality and their sales/support are good as well. I am exchanging my current mattress for one that has a little give in the comfort layer. My thread is discussed here if you are interested:https://forum.mattressunderground.com/t/please-help-side-sleeper