Although I agree that Blackmoon is a good piece of software I have a couple of criticisms.

Firstly, are reviews on this site restricted to Windows applications? The origin of FTP is in *nix based systems and there are many more mature servers for this platform than for Windows. Both glftpd and proftpd are pieces of free software with all the features of Blackmoon.

The obvious thing to be said about this is that they are both harder to use than Blackmoon. I accept this, but the price offset is large and besides, Serv-U is infinitely easier to configure by people who do not know what they are doing than Blackmoon.

Other than that, good review :p

Martin