Rated 4 out of 5 stars

Very good so far. Could prove exactly what I need since I have a home pc, laptop and office pc and all of them I have thunderbird, so I need my tasks synced across all devices.

The only thing I don't see is an auto-sync feature. I created a few tasks on the laptop, but they were not synced on my office pc, until I manually pressed the sync button. Would be nice to have auto-sync every couple of seconds.

Well done.

This review is for a previous version of the add-on (0.5.2). 

Auto-sync at intervals was removed a long time ago and isn't coming back because it consumed copious amounts of API quota.