Product review (3 stars): Does the job.  Not for the feint or those prone to breaking things.  Instructions not included.
No instructions whatsoever.  Had to rely on youtube...  As near as I could tell the only piece that really matters is the heater bar clip the keeps the fridge coil drain from icing over.  The unit I worked on already had lots of insulation and the same style drain tubes.
The good news is does resolve the Ice skating rink under the vegetable drawer, and they don't need to leave a towel in front of the refrigerator anymore.
It takes a while to defrost enough to remove the covers.  Look for manual defrost mode and your mode on y0utube. It cut the time to about 2 hours.
A 3x5 card with a web address would have helped.