As a social gaming app developer, we have to deal with massive user data for both BI and CS purposes. Reliability is most important thing to us. We could not afford losing or missing any data related to the customers. We have been using RudderStack since it's early beta time. We use RudderStack for our data analytics platform, UA attribution platform and raw data host/backup. With RudderStack, it has provided us the reliability we need with the extreme flexibility that allows us to direct the user data onto different BI platforms we need them to be. Nevertheless, it only needs one SDK implementation and client release rather than put multiple different SDKs in for those platforms and debug them. It saves us numerous eng hours for a startup like us so that our eng team including QA folks can focus on the product itself.