If you already depend on rsync to transfer files to and from a non-OSX box (ie BSD, etc), don't use it. It screws up rsync from the command line. I jus transferred from files from my Mac up to a client's site. They are zero byte files. Joy.
Unfortunately, there is no help or link provided anywhere in the GUI.
So, instead of spending .3 seconds updating a one file change, I get to spend the afternoon trying to figure out how to back out of this.
Even if this was a gorgeous, wonderful app, there should still be an easy way to unintall, or at least information HOW to do it.