Product review (5 stars): Perfect!
Worked great on my Subzero 600 series fridge.  I know if I had called a repairman to fix this it would have been over $125.  Instead, the part cost about $5 and was very easy to install.  In fact, Subzero has detailed instructions on their website on how to do this.  Would recommend for anyone who needs a new light switch for their SZ fridge.