One small drawback is its so-so speed of heating ... In our surveys, Thermador over-the-range microwaves receive top-notch ratings for predicted reliability and midlevel marks for owner satisfaction.

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 ...