Rated 4 out of 5 stars

The plug-in works great except for one problem:
I am using an IMAP-mail account. In addition I have local folders. When applying filters to copy some mails into the local folders, the plug-in will not notice when mails arrive matching this filter. Thus there will be no blinking for those mails.

This review is for a previous version of the add-on (1.1.1).