The quality of the mattress. While we are, in fact, still evaluating whether the mattress is right for us, there is no disputing the quality of the construction. We also like the follow up to both the purchase but also any questions we might have for receiving and setting up the mattress.
Firm but still has that perfect give to make me feel comforted and held. I've been recommending it to everyone I meet/see since I got it. Even when they don't ask I make sure everyone knows I just got a new mattress, "I feel great, look at me I'm glowing!!! It's my new mattress. I'm so rested. Tuft & Needle, check em' out if you want this super sweet peaceful vibe I've got going on."