DDDYKI
100+ Head-Fier
I found that the XL-Pads become worse over a span of 8-9 months. The memory foam becomes smushed and stays smush.
More like a month for me, at least on the left side.
That said, the pads are absolutely comfortable. My head kind of pushes the limits of the headphones, I occasionally have to shift or readjust them. But overall, they are comfortable.