C_Lindbergh
Headphoneus Supremus
Nope, no material or construction issues that I can see. No rattling either. I was actually pleasantly surprised with the build quality once I held these; some of the comments earlier made me think B&W had cut too many corners in addressing the comfort issues of the PX. These feel nice and sturdy to me.
Overall I also like the build quality, except the buttons, especially the play/pause button, buttons doesn't feel that tactile imo.