I like that it supports open source languages, such as Java or Golang; so we can use our favorite language for building services with it! The documentation isn't very clear about how you should write your code (it's not easy!). If you have some experience with other systems, then this will be easier. We are solving issues related to performance of applications built using different programming models - Go/Golangs, NodeJS etc. The best thing about zipkin is that it can be used with any language,