I bought these due to the low price, but did not have enough information when purchasing on the skin layouts. The purchase was a mistake and they stay unused. If your looking for a budget skin they may help as they teach you on how to build your own skins!
It is what is says, a simple sitemap. Could double as a simple quick navigation as well. Also, could serve as a module development learning tool since source code (145 lines of C# code) is included. Good value for the price.