The interface (GUI) is OK (and looks better than mine honestly), but the usability isn't great. The query syntax is tough to grok IMO. Using the sample dataset it took myself and a friend who knew Kibana like 5 minutes to figure out how to make a pie chart of the various OS types. It's probably that we're just dense and don't know what we're doing, but with log-store you just click the pie chart icon next to the field, and it will update the query and render the chart. I think that's easier to use.