Rated 1 out of 5 stars

Tried it. Some addresses moved over...A LOT DID NOT! So, not so reliable. Since you're going to have to move them over the ones that this tool didn't move, you may as well do it manually to begin with and save some time. Good idea, just doesn't work like it should.

This review is for a previous version of the add-on (0.8.4). 

Boblykssk, the behaviour you are noticing is very likely explained by the fact that the addon doesn't currently sync mailing lists or the contacts in them.

See:
http://www.zindus.com/faq-thunderbird-google/#toc-what-isnt-synchronized
http://www.zindus.com/faq-thunderbird/#toc-roadmap

If you think there's a bug, please use the support references below.