Sketchfab is a platform that is generally considered legitimate and safe for consumers to access. It is a leading platform for publishing, sharing, and integrating interactive 3D and AR experiences online. However, like any online platform, user experiences can vary. Some users have praised Sketchfab for its range of 3D models and smooth operation, while others have raised concerns about customer service and the marketplace. Therefore, it's always recommended to use common sense and pay attention to details when engaging in online transactions of any kind.