Rated 4 out of 5 stars

At first, after installation, all contacts were synced but only a few of them were in TB's mailing lists which correspond to the matching Gmail contact label (all of my contacts are categorized with labels). After searching around a bit I realized that normally every Gmail contact should have an E-Mail address defined, which was not the case for a number of contacts. My problem vanished after I defined dummy E-Mail addresses for the contact lacking one. It would be nice if one wouldn't be obliged to do this. But, besides this minor glitch, this is a "must have" for anyone using TB together with Gmail.

This review is for a previous version of the add-on (0.4.20).