Rated 5 out of 5 stars

As a plugin - this is indispensible. It should really be maintained by zotero, just like OpenOffice / Word plugins. Without it, I wouldn't be using zotero at all. Collaborative academic writing is possible with this, zotero, Lyx and a subversion server. Works brilliantly once set up.

This review is for a previous version of the add-on (2.1.5.1-signed.1-signed).