Hi Punjabi,
While other people’s comments about the knowledge and service of a particular business can certainly be very helpful … I would be very cautious about about using other people’s experiences or reviews on a mattress (either positive or negative) as a reliable source of information or guidance about how you will feel on the same mattress or how suitable or how durable a mattress may be for you and in many if not most cases they can be more misleading than helpful because any mattress that would be a perfect choice for one person or even a larger group of people may be completely unsuitable for someone else to sleep on (see post #13 here).
The Tuft & Needle certainly uses good quality and durable materials and there are no weak links in the mattress in terms of durability so you certainly made a good quality/value choice but of course the only way to know how well you will sleep on a mattress will be based on your own personal experience.
Most importantly … congratulations on your new mattress 
I’m looking forward to your comments and feedback once you’ve received it and have had the chance to sleep on it for a bit.
Phoenix