I think that GVStreamer is extremely easy to use, and fits my needs perfectly. I recommend this tool to everyone who wants to develop chart visualization without spending several hours/days figuring out the details of json data source structure. I am always wary of purchasing software without having had the chance to demo it first. Having the opportunity to test the basic version gave me the confidence to buy the GVStreamer extended version

Sidney Ferraz, Business Consultant
Sao Paulo, Brazil