Rolling out an internal developer portal (IDP) can seem straightforward: select a tool, define success metrics, and test adoption. But at Serko, Darshit Pandya discovered that leading a successful IDP proof of value (POV) involved far more complexity. From securing stakeholder buy-in to navigating the build versus buy debate, each step revealed gaps between expectations and reality. In this talk, Pandya shares how his team approached vendor evaluations, identified early misconceptions, and refined their strategy for measuring value and driving adoption. He reflects on the challenges of aligning internal teams and the lessons that reshaped how Serko plans and executes IDP initiatives. Whether attendees are preparing for their own POV or already mid-implementation, this session provides practical insights and cautionary lessons to help avoid common pitfalls and drive more impactful platform outcomes.