Rated 4 out of 5 stars
I gave it 4 stars only because I can't give it 3 and a half. Nice add-on. Synced instantaneously, with no duplicates, however:<br>
I sync my Android phone with my Google account. I have A LOT of contacts on my phone in which I do not have e-addresses for and the sync with Google mirrors my Android. This add-on ignored the grouping if a contact has no e-address (I have a group called Clients in which I have 55 entries on my Android/Google. Only 5 have e-addresses. Even though all 55 were synced, only those 5 where put in to the Clients group in Thunderbird's AB.)<br>This would be a great enhancement for a future release. Then I will give it a higher rating.