The experience is all good. The toolchain, the speed of both development and execution, the breadth of CPAN and the famous backwards-compatibility all make for a happy development team.
The advantages are the same as they have been for years: cross-platform compatibility, one system to run all aspects of a large project, the flexibility to get the job done in the simplest, most efficient and most maintainable manner.
One caveat: we don't do any MSWin32 development at all. I'm vaguely aware that there are some extra considerations on that O/S but it isn't something which we have to deal with.