Building beloved user applications is a challenging yet rewarding pursuit for us working in technology today. While real user monitoring, or RUM, metrics are added early for external-facing applications, it is often added as an afterthought in the building of applications when building applications for users within organisations. Instead, we rely on anecdotal discussions and review feedback that, for many reasons, can leave us with an incomplete or accurate picture of the adoption of the software we build. In this talk, I will use my experience in building applications in investment banking to discuss the reasons why obtaining long-term feedback on feature adoption can be difficult to validate. We will also outline how combining real user monitoring and application monitoring using tools such as Elastic RUM and APM for JavaScript and Java respectively can help you quantify user experience satisfaction and adoption to ensure we are providing effective experiences for users.