I went to install it once because I heard it was good. It said the next step of the installer is make a plex online account so I can log in. I looked for the 'I don't want online I want local' option but I didn't see one. So I uninstalled.
Nowhere did it explain what if any access Plex servers have to my media library (metadata or files), so I said no thanks I'll just go back to using folders.