I think the foundation of this comment is incorrect. This helps you build up the rsync command and test it. It gives you the rsync command that it runs. You're supposed to take the command it generates and use another tool to automate it. You're not supposed to automate the interface. It fulfills the conditions you expect of it.

And personally, I loath constructing rsync commands. Every 2 months I have to parse that 2300 line rsync man page. And every 2 months google sees another search query "rsync GUI" Because I am sick of building these things.