We were impressed with Power BI for Office 365 when we checked it out earlier this year. The tool has now upgraded with a new 'Q&A' feature that makes it easy to create visualisations from simple natural language queries.
Microsoft has also enhanced its Power Query tool and renamed its GeoFlow technology as PowerMap. Collectively, it's a useful set of tools for when you need to create visualisations from complex data sets.
Right now, the product is still in preview, but you can be waitlisted to sign up and access it. Hit the announcement post for more details.
Microsoft Updates Power BI for Office 365 Preview [SQL Server Blog]