A fairly detailed review of Armangil's podcatcher has been posted over at the "The CodeMode Chronicles" weblog:
http://codemode.typepad.com/the_codemode_chronicles/2004/12/podcast_tools.html

This review has been posted on December 2004, yet it still applies to the most recent version, because new versions only add features and do not change existing features, at least in theory. It is worth noting that Bittorrent support has since been added.

One quick remark: the -m (download history) option should be set to a considerably greater value than 10, as a too small value increases the likelihood that podcasts will be downloaded twice. The default value of 1'000 seems more reasonable. An infinite value is allowed yet not practical, as this leads to an unbounded history file size (which is hardly desirable for a robust system).

Conclusion: this review is a great starting point for users of "Armangil's podcatcher".