Yummy FTP provides a transcript view of the interactions between the server and the software in an easy to get to place - right in the browser window. Pull up the divider.. it's like lifting the hood!

But however useful it may be to monitor the transcript activity, it's even more useful to be able to enter commands to send to the server directly. Enter navigation and listing commands and see the results - it's an interactive session! You can even transfer files from here!