The Twilight Luxe mattress really evolved over the 100 days. Initially, I loved it. But in the very short time of having it, it started sinking in the middle. Like an old spring mattress. Not like a memory foam mattress. It became incredibly uncomfortable. Impossible to sleep in bed with someone and not roll into each other. And horrible edge support. I’m currently in the process of switching it out for the Twilight (not Luxe) mattress. I’ve only had it for a few days. So far, it feels like sleeping on a yoga matt on the floor. But I like a firm sleeping surface. I’m a side sleeper with back pain. Per the Helix Mattress Quiz, the Twilight series is the right decision. Will definitely watch to see if it starts to sag as much as the Luxe.