Product review (3 stars): The unit seems to be a good replacement for my old unit but the shaft for ...
The unit seems to be a good replacement for my old unit but the shaft for the fan is much smaller, so the original fan blade will not fit on the new unit.  I have ordered the fan that amazon recommends for this unit and hopefully I'll have my fridge back in service tomorrow.

For those of you with the same unit as me, I'm replacing a Kitchenaid part # W945523, for a Superba 36. Make sure to get a replacement fan suitable for this unit.