Have you used it? I posted asking if others had good experience but got no response. See thread below for the results of my test fax. Take a pic of documents and fax it
Near as I can tell there's no way to fax a Word or .pdf file instead of a picture. Makes no sense not to do those but I didn't spend a lot of time digging. Also it doesn't receive, just sends, so you have to have efax or something similar to receive.
I'm tempted to sign up since I literally carry a portable scanner at times and this would be a good enough alternative for some uses.