My in-laws bought a SubZero and was nothing but problems and big $$ to fix. I know SubZero is good name, but not worth the extra IMO.
Our American-made Sub-Zero (installed in 1995) is still running, although we did have some minor problems with it.
Sub-Zeros are expensive, worse now than in 1995 when we bought ours. It needed a few repairs over the years, but our repair guy is very reasonable.
We're *praying* it lasts until we move outta here in a few years, because we really cannot afford to replace it. It is built into the cabinetry, so no other refrigerator would fit in that space. :-/
Good luck, LouAvul!