The Give.org and Great Nonprofits websites offer reviews of the charity Operation Smile. Give.org is the website of the Better Business Bureau's Wise Giving Alliance, and Great Nonprofits allows any individual to post their review of any nonprofit or charity.
On Give.org they present a comprehensive review of Operation Smile, based upon specific Better Business Bureau standards. The site first details what standards have not been met and why, then moves on to detail the number of complaints that were received in the past 36 months.
Great Nonprofits lists personal reviews of Operation Smile, with a description of any positive or negative interaction with the organization. This site also provides a star ranking to indicate level of approval with the charity.