Each time this topic reappears, my mind takes the same trip that Gerald's does (well put, Gerald, by the way).
Our Monterey's Dometic, which sounds similar to Mike's, has operated virtually flawlessly. We had a Dometic in our '84 Pace Arrow that needed a new cooling unit twice only because of my initial lack of RV knowledge once and outright stupidity the second time. No fault of the fridge; I did add a rear compartment venting fan to it though - no modifications have ever been needed on the Beaver's unit. Just keep them relatively level when parked more than a half hour, and do regular maintenance. Operationally, the newer one in the Beaver actually has required less care, is more efficient overall, and is less sensitive to ambient changes than the older ones, in spite of being larger and more complex in engineering.
Since we dry camp a lot, a non-gas fridge would require additional batteries I'd have no idea where to put, or I'd have to use fuel running the genset a lot more than we do. Others who rarely dry camp for extended periods and have one probably find very handy the extra space provided for food by a house fridge. But I prefer forest camp environs too much. The gas operation is quiet and efficient. Should the coach propane system fail from a siezed regulator valve or something, I could always extension cord the fridge over to an inverter-powered outlet until repairs can be done. On a side note, the Pace Arrow's old fridge was 3-way, but its 12 volt operation (mostly for on the road) didn't keep the heater hot enough to move cooling unit chemicals very well, and was certainly never intended to actually cool down from scratch.
There are plenty of members here that love the house fridge in their coach. You have to approach it from how you use your own rig and whether changing out an unfailed RV fridge is worth the cash. Many made the change only after being faced with a faulty unit, since at least some money was on the line for repairs anyway.
Joel