Segment does a great job of event tracking for analytics. It integrates well with other tools like Heap and is very easy to explain to others about how to add a new event to track.

We use segment to collect and send data in different destination, it's easy to use and to implements

great, it helps a lot in collecting customer's information

Saved a ton of dev time

It is incredibly easy to install with modules for any kind of source (app, server, API, jacasript). It sends coherent and consistent data to hundreds of destinations (I think there are ~200 and counting, but new ones can be added with very little coding), and new destinations can be added with no intervention by an engineer. Among the destinations, there's also relational Databases: you can really track ALL actions of any single user of your system and having access to historical data with a click. This is amazing! It offers an easy and intuitive privacy mechanism that lets you deleta data of a single users from multiple systems with a single click. It offers common, consistent data to all different areas of a company: marketing, product development, finance, ... (and you can chose what different offices can see).