We replaced a combination microwave/oven unit with the GE 7800.  Having the ability to use the microwave/oven in their traditional ways AND convection has opened up a new world for us.  The oven doesn't heat up the entire house.  The roll out racks make it so easy to lift hot dishes out of the oven. There's so many good things about this appliance.   It was the best decision we've ever made.