@danwdoo-
As 'insurance', USBNetwork allows you to have access to parts of your kindle software that you would not normally be able to interact with...this is
good if your kindle has a serious software problem that you are trying to fix, this is
bad if you don't know what you are doing
as you can cause a serious problem that needs to be fixed.
If you are able to just install and forget, it gives a doorway for the dev's here to help you try to fix a serious software problem (partial brick). If you are like me and would be unable to resist the urge to tinker (
) even though you don't know what you are doing, then you should probably forget it.