I've just started using FSX KML and the only thing I really miss is a more detailed tutorial that can be read by a beginner. As things are written right now you need a lot of beforehand knowledge to figure things out.
Also, an explenation of the more advanced XML commands would be nice (The landclasspolys, roads and utilities ones are obvious, but there are a few exotic ones).
Thanks for making such the program available to the FS community! If you can make it a bit easier for a numnut like me to understand I can give back to the community a few decent sceneries