I didn't like the fitting/install process. It was a lot harder than the last time when I used the official Bose replacement ear cushions. I think the size (on mine at least) are a fraction too big, resulting in me having to use an uncomfortable amount of force. This is minor though, and would only deduct 1/2 a star if I could.
I like the the build quality, the comfort of the memory foam padding, and the feel of the material.