I use Compress::Zlib on production code.
It's on Linux, so I can't guarantee that translates 100% to windows, although I'd hazard a guess that it's as stable.
The scripts I've got going run through about 40GB of data per week, and integrity checks show it's having no problems at all..
I'd say it's plenty stable enough (currently it's on a run of about 140GB, and it's quite merry).

Cheers,

Malk