It is very easy to use, it's free for open source projects.I like that you can create your own connectors and write custom components (transforms).It has some limitations in terms of performance and memory usage but this could be improved with more effort from confluents side. I think that using Kafka Streams API will make our work easier by providing us a lot of tools we need to build applications which process real-time data. We are solving problems related to processing large amounts of streaming data coming from various sources.