I am adding some new functionality to a Java web-based application to do charting. I found JFreeCharts on Google and was curious if others have used it. If you have, I would be very interested in finding out how you liked the product. Was it easy to use? Did it accomplish what when wanted it to do? If you know of a different open source product, I would be interested in hearing about that as well.

Thanks in advance for your time.