In a conventional oven, the heat is blocked either by the pan or the pot that contains the food. Since the heat just moves in a one-dimensional direction, the parts of the food that are blocked by its container become undercooked. A convection microwave does not only quicken your cooking time, it is also capable of thoroughly cooking your food at lower temperatures. While fixation to fast food is one of the major factors, the widespread use of microwave ovens has added to the detriment of the American population's general health. Current statistics show that 60% of the American population is considered obese. If this rate is to go down, a major overhaul is necessary as far as eating habits. When those containers with cling film are used, better poke some vent holes in it with the use of knife to let out the hot steam. Safely uncover the cooked food. Start opening the cling film or lid from the side. Follow a direction that sides away from your face. Be sure to keep your face and your hands away from the steam or any hot liquid so you will not suffer from a painful burn. Though this type occupies more space than over-the-range microwaves, there's a lot more space inside to cook food with. If you want to impress guests on Thanksgiving Day, then you would do well to have one of these. Over the Range microwaves, meanwhile, more than makes up for its lack of cooking space through the amount of space saved in the kitchen. The history of this kitchen appliance goes a long way back to the World War II era wherein there were two brilliant scientists who created a magnetron, a specific type of tube that emits microwaves. In the war, the magnetrons were mounted into the radar system of Britain which helped a lot in spotting the Nazi fighter planes. Since cooking in microwaves takes less time, more nutrients are preserved. As a matter of fact, food cooked via microwave is a lot healthier because there's no need to use oil during the cooking process. The water in the food is stimulated instead to facilitate the heat transfer in the food. Easy to Clean Cleaning microwave ovens is a breeze; I even daresay that it's fun.