We have microwaves in all our deluxe rooms and our guests shared kitchens. In 9 years never a spill or damage done in the rooms, however the little kitchens microwaves often need to have a little more attention. We supply the plastic meal covers for use to help the cleanliness. Ours are only small manageable units purchased from Aldi. All were upgraded 3.5 years ago and 3 purchased for spares still new unused in their boxes.
Mums often appreciate them for babies meals. This is advantage to upsell from a standard room top a deluxe room.