Google's Fitbit Air is a sleek and lightweight fitness tracker, but its AI coach raises concerns. The device's comfort and ease of use are impressive, with a simple band-swapping mechanism and a lightweight design. However, the Health Coach feature, a relaunch of Fitbit Premium, is a source of worry. The AI coach has already begun hallucinating, providing incorrect and fabricated data, which is a significant issue for a paid service. This incident raises questions about the reliability of AI fitness coaches and the potential for such errors to impact user trust. While the Fitbit Air's physical attributes are commendable, the AI coach's performance is a red flag. As an expert, I'd advise caution until the AI coach's reliability is assured, especially considering the potential for such hallucinations to occur. This incident highlights the challenges of integrating AI into fitness tracking and the need for robust verification systems to ensure user trust and data integrity.