Naturally, it depends on how you are going to use your boat. When cruising, like last week, we probably eat half our meals aboard. The microwave is great for warming up a cup of coffee/tea, baking potatoes, and obviously lots of other foods that you might otherwise need to cook in the oven. We try to avoid running the oven for an hour and putting all that heat in the cabin. Our primary cooking method is the BBQ grill on the stern rail. But, as others have mentioned, the microwave is also great for reheating leftovers. We've mostly used it with the generator, but have, on occasion, used it on the inverter when we are getting peak solar input don't harbor doesn't drag the batteri s down too much. I would definitely vote for having one onboard if you have the space and power to accommodate it.