Finally got my Pro setup; nice. But no operating instructions, per se. It appears that one can only tilt the back rest and can only adjust the seat height - not other adjustments, e.g., set bottom angle like I can on my Aeron. Also - the head-rest pillow cam without a snap-strap, i.e., it's one piece and therefore you cannot thread it through the holes (like the pictures imply). What's weird is they included the weird hexagonal-thingie that you run the head rest strap through to make it lower (see attached pics of my chair and one from the AK website). Admin, and/or AK -- what's up w/ the non snap-strap on the head rest pillow??