Product review (5 stars): Good replacement!  Fits my older dryer.
Nothing excites me more than knobs that work.  Hyperbole aside, for me it is a replacement and updated version of a broken knob.  I was concerned when people said it didn't fit.

I am not an expert, but I would say, if the model matches what you're looking for, check to see if there is a little metal piece still connected to the metal insert where the knob connects to the unit.  It is normally connected to the selector to reinforce the plastic.  It may get separated if the plastic breaks and remain on the washer/dryer.  If that happens, this or even an original selector from the same unit won't fit right until you remove that small metal piece.