Unquestionably an excellently-constructed addition to Joomla! Surprizingly simple first use, yet has the functional richness and flexibility to do pretty much anything else you might want to do with the available charts. It comes with the most thorough documentation I have ever seen for a Joomla component.
I have stumped up the small fee for the commercial verion so that I can embed charts directly in my articles. The results look magic!