I like how you can easily query your data without having to write any code. The UI could be easier to understand but overall this product has been great so far! There isn't much i dislike about this software yet. If there was anything i would say its that sometimes when querying certain metrics they don't show up correctly or are missing completely. This is not always their fault though as sometimes some of these types of problems are caused by our own data collection system which we haven't had enough time to fix. We have solved many issues regarding monitoring the health of our application using Druid.