Using Code Explorers and Diagrams to Learn Arduino

I'm not trying to take anything away from anyone. I am just trying to point out that it isn't simply a free lunch. If it was, there would be no need for the express editions of Visual Studio. At the end of the three year period, your license expires, and you should then purchase a full license to continue using the software (with the exception of Expression Web, which you get to keep), or stop using it.