Product review (5 stars): It's a knob.  It works. Then it breaks.
It's a knob and it works.  It's built for my stove and the fitment is perfect.  There's nothing else to talk about, really, except that I couldn't believe that a knob would cost that much.  I should expect nothing else though.

*****
Long term review:
It broke... Again. Not at the fault of the seller, but seeing as this is the knob that goes on the exhaust fan, it is the hardest to turn of them all. Ordered another which arrived very quickly. Wish they would reinforce the part that grips the protrusion though...