The truth be told, IMHO, is that, while CX service in Y is outstanding, sitting in the actual seat can be unbearable, especially after 17-19 hours.
I was most comfortable when my colleagues and I spent 4 or 5 hours standing near the exit door in the galley where they sort of set up a snack/drink table. The FAs were nice and didn't mind us there at all and the sandwiches and drinks became a self-serve deal.