Product review (3 stars): Inconclusive results
After several weeks full time in my RV using these pads in my Dometic refrigerator/freezer, I have noticed less frost build up on the upper ceiling of the freezer, no frost on the cooling place under the upper pad, and some ice build up around and under the lower pad.
I can't say they are doing anything as they seem to be just vinyl pads with some filling of some sort and I see no mechanism for how they can do anything, but there has been a change from the previous few weeks before installing them.
I can't say they are junk and I can't say they are a fix. But for now I will continue using them as I currently have no conclusive reason to toss them out.
As it is, trading frost on the upper section for ice on the bottom is an acceptable trade off.