Rated 5 out of 5 stars

This is a great add-on, and it has solved a nightmarish problem for me.

But I have a suggestion for the auto-sync feature. Having it sync periodically (say every hour) works well for a desktop workstation that you leave on a lot. But for a laptop installation, it'd really help if there were an option to sync every time you start Thunderbird (and/or to just ask if you want to) -- And on exiting Thunderbird, check for new address-book entries and ask if you want to sync them before exiting.

This review is for a previous version of the add-on (1.0.1).