Actually, that's exactly what I did last night. I found it all of the things you said. Consistent api across functions, lots of methods of formatting data labels. A+ on the documentation and examples. It also includes various meters and gauges that I thought might add to the application. I'm comparing it to the charting in Report Lab. I love the fact that Report Lab lets you specify a function to call to translate data points to labels. At this point I will still continue to evaluate it, but so far it probably is not compelling enough to move from Report Labs. I would highly recommend those need a graphics package look at CD though.
-- http://mail.python.org/mailman/listinfo/python-list