I bought both a Sundanzer fridge and freezer for my off-grid home. The freezer has been fine but the fridge failed shortly after it was out of warranty. When I called Sundanzer for assistance they knew what the problem was- tiny holes in the freon lines. But they wont cover it or stand behind their product.
I called an appliance repair person but they said I would be wasting my money as it would not be fixable- the holes are tiny and can be inside the insulation and not reachable.
So it appears to be a random thing as to whether you will get one with bad freon lines or not- I havent treated the freezer any differently but its fine. This is way too expensive a product to have it be a throw-away item. I wont buy one again!