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 ...

I purchased a double wall oven in 2022 from Lowe's. It was cleaned as directed. By 10 months the ceramic coating was literally coming off on the tracks for racks and on the bottom of the oven.