It's great (when it works!) Rated 4 out of 5 stars
Love the addon, but sometimes it's unable to show the download time remaining data in the status bar and thinks it's idle. API does match and I'm still able to send .nzbs to Sabnzbd through the addon regardless.
I don't know how to reproduce this bug as it's rather random. Using Firefox 3.6 and nzbdstatus 220.127.116.11 (also happened on the version before that)