Yazio’s onboarding is a bit unusual; It’s extremely long. It takes, on average, around 10 minutes to fully finish it. However, by the time you’ve finished it ,you’ve developed a relationship with Yazio, and with little green yettie that walked you through it all. This is not by chance - the onboarding at Yazio has been meticulously tested, tweaked, refactored, and tested again, to find what it is that makes users feel the most welcome. In this talk we will discuss the plan, pitfalls, successes and failures of having an onboarding that matters, at a very very large scale.