From what I read in these forums, it seems like it's the larger size propane RV refrigerators that may be making for their sometimes bad reputations.
If so, maybe it's trouble keeping a larger volume cool using the absorption technology that is really the cause of the cooling and other problems ... especially the larger sized refrigerators that may be installed less than ideally.
Many owners of 6-7 cubic foot and smaller RV refrigertors report good service for years, and in all kinds of conditions. :h