Hi drb2003,
Congratulations on your new mattress as well 
As you probably know from your reading here you certainly made a good quality value choice and I’m looking forward to your comments and feedback once you’ve received it and have had the chance to try it out.
While I can’t speak to how a mattress will feel or how different mattresses will compare in terms of comfort and PPP (Posture and alignment, Pressure relief, and your Personal preferences) for someone else … outside of “comfort” and PPP the most important part of the value of a mattress purchase is durability which is all about how long you will sleep well on a mattress. This is the part of your research that you can’t “feel” and assessing the durability and useful life of a mattress always depends on knowing the type and quality of the materials inside it regardless of the name of the manufacturer on the label or how a mattress feels in a showroom or when it is relatively new (or how long a company has been in business) so I would always make sure that you can find out the information listed here so you can compare the materials and components to the quality/durability guidelines here to make sure that there are no lower quality materials or weak links that would be a cause for concern relative to the durability and useful life of a mattress you are considering before making any purchase.
There is more information about the type and quality/durability of the materials in the Tuft & Needle mattress in post #2 here in the simplified choice mattress topic and in posts #2 and #6 here and as you can see there are no lower quality materials or weak links that would compromise the durability or useful life of your mattress.
Phoenix