Very VERY nice write-up jatrax!
I wanted to add our experience with the typical "absorption" type. Our unit works on propane and 110V. It does not have the 12V mode. Keep in-mind that when on propane, it still requires 12V for it's electronics, though is very little. So if the house batteries are dead or disconnected, the fridge will NOT operate on propane.
Given our rig is 11 years old, we might have dodged the "China Made" start-up issue.
About the door hinges breaking, it is seemingly a common issue with older models, on other forums . They break primarily for two reasons working together. First is having a lot of weight in the door shelves. Second are rough roads jarring that heavy weight. If a door hinge breaks, the door MUST be replaced. It cannot be repaired because the hinge is molded into the door being all one piece.
I don't know if Norcold redesigned the main door since we bought our PC, so I was proactive and installed a Norcold hinge reinforcing kit on both the fridge and freezer door, both top and bottom hinge. You can see what I did by clicking
HERE and scroll down to #25.
As far as the performance of our propane/110V absorption fridge is concerned, it cools down in 3 to 4 hours at room temperature on propane, and keeps things at the proper temperature. We operate with propane much more often than 110V. We have never complained about it's performance. Admittedly we have not yet traveled in temperatures over 100 degrees so we don't know how it would perform in such extreme conditions. Another point to make is, our fridge is NOT in a slide out and it has the roof-mounted vent, not the upper wall vent used in recent years. The design deviation might or might not make a difference.
One final comment. Our fridge uses so very little propane, never concerned over propane consumption. On one 3 week trip, we used the fridge on propane the entire trip (also cooked often and used the furnace one night) and never filled the propane tank. It did run out just a few hours from home.