Customer review websites often prove very helpful when evaluating a business you are considering doing business with. Regarding child care programs, Yelp and the many other online review sites, indeed, prove informative. You can utilize these sites to get a sense of how well managed a child care program is. To find reviews for programs you are interested in, conduct a Google search for the name of the provider with the word "reviews" included in the search box.
Remember though, review sites only give you one side of the story. In the event of a negative review, there may have been a staff, administrator, ownership [or all of the above] change since the review was written. Therefore, don't make your sole decision about a provider based on online reviews alone. Despite their usefulness, review sites cannot compare to an in-person facility tour to get the full picture of how a program operates.