Hi Sleeplessinlawrence,
In addition to the many comments in the topic that CuloInteligente linked (thanks CuloInteligente :)) I would also keep in mind each person’s experience can be different from others and that Tuft & Needle have a great return policy so there is very little risk in trying it to see how it feels for you and your own sleeping experience will be the “best” reassurance about whether it’s a good match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences).
Some of the comments there are also about their older design and there is more information about their newer design in posts #2 and #6 here and the rest of the topic.
Phoenix