No problem Peter, I did not take it as criticism at all, but as feedback and, man, do I like that.
As a matter of fact, it was so valuable that your comment gave me an idea of another point of extension for Money.
I will be adding a more clear example of the significance of both methods, both in documentation and in tests.
Actually, some people will be glad to know that the next release of NMoneys will come with generated API documentation, including this case ;-).
Glad to hear that the library is useful.
Cheers