Everyone has to have the addon for it to work properly.

Created items to give out will not work if the other person does not have the addon installed.

I’ve been playing with the addon and I like it so far. Here’s just a few of many) ideas for using it in game for folks:

An in-game character journal.
Tickets to a RP event.
Invoices for player vendors.
Mail/note delivery or courier services.
Make your own quest items for guild or group’s RP.
Awards for guildies and friends.
RP Props for Engineers, alchemists and such.
Guild “flyers” or instruction manuals.
Newspapers or handbills.
Backstory items to share during RP.
Guild badges or insignia.

It’s really up to you and your imagination. As always. :)

Note: For books and such, make a backup of the text in case a patch or update wipes the info. You never know.