Product review (4 stars): Recommend the Replacement Part
Replacement part is an upgrade from the original single coil defrost heater, and lifetime warranty is a plus.  The only thing I would warn against is the instructions in my case were incorrect.  The instructions listed to cut the wire to the left side of the evaporator that leads to the left side of the part when replacing the single coil with the double coil, but in my case that was incorrect.  I needed to run the wire on the right to the lead on the left of the heater part, so that's the wire that needed to be cut and extended.  The problem was I didn't determine the instructions were wrong until after I cut the left side wire.  Still, highly recommend this vendor for price and warranty.  Replacement part works just fine.