Rated 4 out of 5 stars

I love this add-on, but 1.0.1 doesn't work for me. I uninstalled Lightning and Provider, re-installed Lightning and then provider 1.0.1. New calendar -> google calendar -> my gmail address -> then a screen to choose my calendar/tasks, but this had nothing for me to choose! Having got stuck there I uninstalled 1.0.1, found previous vsn 0.32 and re-installed that. Then I set up the calendar link using the old-style private XML link that's still provided on the Google calendar settings page, and it's now working again in Thunderbird/Lightning. I'm not sure for how long though, if 1.0.1 was an essential release! Vsn 0.32 available here...
https://addons.mozilla.org/en-US/thunderbird/addon/provider-for-google-calendar/versions/

This review is for a previous version of the add-on (1.0.1).