Honestly, an exceptional mattress especially with back pain

I am an engineer so I studied replacing our old Simmons Beautyrest; tried 4 different mattresses including one foam block style. This mattress is the best we have ever owned; it is especially good for someone with lumbar (lower) back pain in my opinion. Replacing old mattress with this oe cut back pain by 75% right away. Also the "materials" offering is no joke , it is a tremendously comfortable sleep, especially noted by my wife, a former dancer. I read the oter review and sounds like a manufacturing problem. Honestky, we went and bought five (5) more of these and put them in our second ski home in Colorado. No problems and only compliments from various users. Again, 5 star for us but just our opinion; we have no affiliation or deal with Beautirest etc. American quality should be appreciated!