Only one problem I have is that the web site says:

NOTE: if you manage to get it on really tight don't worry - the face will come off without removal of the new knob.

Maybe this is true for the plastic molded fascia, but the translucent lens won't come off unless you take the knob off. This is critical to doing some kinds of jobs on the player, so you have to make sure the knob can be removed without damaging the encoder.