Well, I got my Vinotemp in Feb of 07, so I guess I've had mine just barely over two years. It's still working absolutely flawlessly.
Of course, I have mine run through an external temp controller (Ranco ETC) so it doesn't run constantly (probably only kicks on a few times an hour in the heat of summer, and rarely at all in the winter), therefor I doubt there's an actual two years of running time on it.
My wife, on the other hand, has two of the exact same units running as bona fide wine coolers, and they run 24/7. She got them shortly after I got mine, so they're probably very close to two years old as well...and still running strong.