From what I have seen FTPS seems as secure as SFTP if well configured (i.e. no fallback), why do you say FTP is such a bad protocol?

I have tried to look it up, but the answers seem to revolve around firewall being hard to setup and FTP being not secure (which is resolved by encapsuling it in SSL).

Also my search suggests than ssh provides an additional overhead compared to using ssl for file transfer (i.e. http://serverfault.com/questions/131240/ftp-v-s-sftp-v-s-ftp...)