ATP Flight School's BBB entry

As of today, the BBB's rating is based on eight complaints filed with the BBB and BBB's own review of the company.



Something to keep in mind: The BBB has, in the past (2010) been accused of downgrading businesses that declined to become members:

Better Business Bureau: The Best Ratings Money Can Buy - ABC News

Terror Group Gets 'A' Rating From Better Business Bureau?


Now, since this is 2017, one has to assume that some things at the BBB have changed. Maybe, maybe not.