But most microwave ovens have less usable space than advertised, according to our tests: In fact, both over-the-range (OTR) and countertop microwaves have a usable capacity of about 50 percent of ...

Over-the-range (OTR) microwaves may be more expensive ... in our heating and defrosting evenness tests. While fairly quiet, the microwave falls in the middle of the pack in terms of heating ...