The Warden/FreeBSD Jails is one of the reasons that I use PC-BSD/FreeBSD. One possible use on the desktop would be a web application developer that wants to keep all the server programs out of the base system and possibly share access with a friend you don’t fully trust. I use The Warden for a similar role personally and I like the fact that at any point I can just stop, move or delete the jail to make the services go away.
With The Warden GUI it makes the FreeBSD jails technology more accessible to the users on the desktop and there is little reason not to use it if your setting up a server for your network. If you are a bit paranoid about security this may help you sleep at night. Overall I was impressed with the simplicity of using the software with the initial importing of the Inmate file the only issue that came up. However I would like to see a little more visual feedback in the output particularly in the creation of jails. I would be happy to recommend The Warden to other security minded friends that are starting with BSD.
Check out the howto here (theitmassive.com – 26/05/20209)