This group exists primarily within the Sonic Boom continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Secret Review Magazine is an organization mentioned in the Sonic Boom television series. It is a hotel review magazine who sends unknown reviewers to hotels to evaluate their services.
After Dr. Eggman opened Eggman Towers, Secret Review Magazine planned to have one of their reviewers evaluate this hotel. News of this leaked to the public however, and Eggman ended up ignoring the real reviewer at his hotel while trying to identify her among his guests.