Google charts are fast, free, and easy to connect to Quick Base -- with a little help!
Quick Base upgraded its charts last year, and added some nice features like being able to change the size of a chart, and save it as a jpg. But we still get a lot of charting requests that Quick Base can't fill. In these cases, our "go to" option is Google charts.
We run schools and have a hierarchical organization: we have children, who work with multiple teachers, in multiple classrooms, across multiple schools. Data Collaborative reflected that nested structure in Quick Base, making it intuitive and easier to use.