To answer the OP's question....
Friends had this same oven for years before remodeling and installing the newer version of the same thing when they remodeled.
The upper oven is a combination regular / microwave oven, which can be used as either, or both at the same. As I recall they said it wasn't a high power microwave, around 700 watts(?). Both ovens are also self-cleaning. It's pretty high-end, Thermador is really good stuff!