This is what it is supposed to be! Our 2nd try with this model. We had high hopes for the 1st one, but it had issues. This one replaced the 1st, it was a Gallery edition. This one is a Profesional edition. It works very well. Glad we tried again. Most microwave convection are half this interior size. The size was important because we use the convection ILO a standard oven. So far, we are very pleased with the performance in all cooking modes.8