My husband and I remodeled my Mothers levitt home (purchased in aug 1947) redoing the kitchen down to the rafters. We installed a 120v advantium over the range unit in 2004. It was manufactured in Korea in March 2003 model #63699. It has never had an issue and continues to work perfectly just like the day it was installed. So I guess we are lucky, good thing we didn't read the reviews. My mother (age 86) so she was 79 when it was installed. She had no trouble learning...