Step-by-step explanation:
A good summary of an essay should probably include the main idea of each paragraph, and the main evidence supporting that idea, unless it is not relevant to the article or essay as a whole. A summary does not need a conclusion, but if the original ends with a message to the reader this should not be left out.
The purpose of an evaluation essay is to demonstrate the overall quality (or lack thereof) of a particular product, business, place, service or program. While any evaluation involves injecting some form of opinion, if an evaluation is done properly it should not come across as opinionated.