I can create clusters, search indexes in matter of seconds without any hassle or problems! The UI could use some improvements but it's not that bad either (at least for me). It also has great documentation so there are no surprises once you start using their product as well. We were searching ourselves how to build our own data lake solution with all these new technologies like Kafka Streams etc., which we need because they help us solving complex business issues - e.g.: realtime analytics over different kinds of events coming from various sources including IoT devices connected via MQTT protocol; machine learning models trained by historical event logs stored into an SQL Server database table.