Consumer Reports has a number of different reviews on a wide variety of microwave ovens. They review over-the-range microwave ovens and counter-top microwave ovens. Consumer Reports also provides price information and tells customers where they can purchase the reviewed ovens.
Good Housekeeping also reviews microwave ovens for their readers. They give microwave ovens a grade, and readers can click on each individual product for more information about that microwave, the pros and cons of its features and what type of warranty that particular model carries. CNet also has reviews on a few different microwave models, including cost, what the ovens are good at cooking and where they can be purchased.