Zotero versus RefWorks

The little I could find about Zotero on the Web was pretty uncomplimentary ...

See, for example, the below:

Zotero Bibliographic Software at MIT: MIT Libraries
"There are still some kinks to be worked out of the software, so you may not want to use Zotero for writing your thesis or for creating complex bibliographies..."
http://libraries.mit.edu/help/zotero/

MIT Libraries uses Zotero in addition to RefWorks and EndNote - They've created a very informative table comparing Zotero with RefWorks and EndNote. It can be accessed at: http://libraries.mit.edu/help/bibliography/comparison.html

I also found an FAQs page about this Firefox extension at: http://www.zotero.org/documentation/#faq_and_troubleshooting (Here it is confirmed that Zotero works only with Firefox).