I am very interested in the buckling gel, and I have considered getting a mattress from Purple a few times. Is it a significant upgrade from memory foam?
It's somewhat subjective of course, but for me it's a huge upgrade.
Form-wise, memory foam will respond to your positions but I feel like it's very slow and I also feel like I'm slowly sinking downward forever when I sleep on memory foam. Buckling gel responds very quickly, latex does as well. Latex is more springy, makes for a good core and isn't too bad to sleep on directly itself either, but buckling gel really fills in gaps and is super supportive.
Temperature-wise, memory foam makes me very hot when I sleep and I dislike that. Latex is much cooler and buckling gel even cooler than that.
(Everything I said about latex applies to polyurethane, which I believe Purple uses for its core rather than latex)
I had a purple 2 king and it was very comfortable but the motion transfer was bad. I suggest getting something else of you have a partner and a couple of grand to spend