Harness successfully transitioned from using an internal feature flag system to its commercial Feature Flags product, addressing challenges such as ambiguous flag naming and inadequate training. This shift not only eliminated the engineering burden of maintaining the old system but also improved functionality, security, and user experience. The migration was driven by a desire to "drink their own champagne," meaning they wanted to use their own products internally to enhance learning and feedback. Despite the difficulties, such as unclear support paths and insufficient communication, the company managed to overcome these obstacles and anticipates long-term benefits, including freeing up the Operations team to focus on more strategic tasks. The experience underscores the value of using one's own products to drive internal improvements and foster a more agile organization.