I haven't used the module, but I noticed it because Math::Int64 uses it, and it worked very well on Windows 8.1 in the Visual Studio 2013 environment. Good job.
I went ahead and installed it. That also went without a hitch. I can't see any reason for the one-star review.
The real purpose is: do one want to rely on something else but perl to install a CPAN module.
This module allows to get rid of the mess that relying on autoconf would introduce (think to OSes like openBSD and its $AUTOCONF_VERSION depdency, to OSes where getting autoconf running is almost impossible like Windows, etc.), and of course without changing a code developped on a box that would use autoconf; identified by the usual #include of config.h.
So go for it.
