Works very well and as advertised, with a few caveats that turned out to be easy to work around.
Disclosure: I am the author of the Lingua::EN::Nums2Words module and I rated it a 5 just to try to average out the one review from Mr. Martin that was rescinded after the 1.13 release, but that is still marked as a 1-star.
It also may be worth reading this nice article on modules that do this type of work, from Neil Bowers: blogs.perl.org/users/neilb/2011/09/cp...
This is a great package for building high quality CLI programs quickly and easily. As an example, I built kpcli (KeePass CLI) with it over a long weekend: kpcli.sourceforge.net/