This product is useful for non-technical users, who are able to use the interface to easily slice data. But for the admin users who are responsible for maintaining the schemas and files behind the scenes, it can easily become a chore, as there is a lot of manual work involved in defining the schemas of the connected database(s), as well as any refactored tables; the restrictive syntax also makes maintenance difficult. A personal feature request I have is the ability to create reports in such a way that the end users can inject values into the query and dynamically change the results in this way.
