Rated 4 out of 5 stars

Tras la instalación aparece un cuadro de dialogo que te pide los datos de la cuenta a sincronizar.
Una vez instalado tiene muchas opciones de configuración.
Si cambias muchos contactos te advierte que esto causa un error de sincronización. Espero esto se mejore una vez que se libere como vercion final.

This review is for a previous version of the add-on (0.2.3). 

Rated 5 out of 5 stars

This is the best one so far. I can't believe it since I've tried them all - this just worked. I'm relieved and since this is considered experimental it will only get better. Nice job.

This review is for a previous version of the add-on (0.2.2). 

Rated 5 out of 5 stars

I am currently using gContactSync 0.2.1 with Thunderbird 2.0.0.21.

This has been my third in-depth attempt to have an add on synchronize my contacts to and from GMail to Thunderbird.

This is EASILY the best addon for this purpose that I've found. Google Contacts by H.Ogi and Zindus by Leni Mayo were both functional, but extremely limited in the level of customization and, more importantly, in the amount of data transferred between GMail and Thunderbird.

My only minor - and I feel that it's very minor considering all of the vast benefits of this add on - is that, occasionally, certain information is initially parsed somewhat incorrectly. For instance, I had an entry with:
LastName, FirstName 'Nickname'
The add on did not correctly identify the different parts of the name. I solved this by copy / pasting to correct the fields and, voila!, problem solved.

I would highly recommend this addon to anyone using GMail (either POP or IMAP) with Thunderbird.

And thanks to Josh Greenen and the rest of the development team for this add on. Keep up the great work!

This review is for a previous version of the add-on (0.2.1).