Hi AnthroposMetron,
I’m not sure who you’re asking or if “T&F” is referring to the Tuft & Needle mattress but if that’s the mattress you mean then there is more information about it in posts #2 and #6 here and in post #205 and later in this topic (the posts before that are about their previous design) and a forum search on tuft needle (you can just click the link) will bring up hundreds of forum posts with more comments and feedback from forum members about them as well.
Having said that … I would be cautious 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 suitable a mattress may be for you and in many cases they can be more misleading than helpful because a mattress that may be a perfect choice for one person in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) may be completely unsuitable for someone else with a different body type, sleeping position, or preferences and sensitivities to sleep on (see post #13 here).
Phoenix