These appliances use high frequency electronic waves, similar to radio waves. The waves penetrate the food, causing the molecules to vibrate; the vibration generates heat, up to a depth of 1 1/2 inches, all round. Some models have a sensor to detect when the food is cooked. Combining convection and microwave cooking delivers microwave speed together with the toasted look of conventional cooking.
With a little practice, it is easy to control cooking conditions and get perfect results.
