Rated 2 out of 5 stars

Used to be a great add-on for Thunderbird, but ever since the jump to 78+, it is no longer compatible. Calendars no longer display by default when opening Thunderbird, and a restart to Thunderbird typically restores all calendars, but eventually they stop displaying again. Notifications for events or tasks no longer appear or synchronize. Reinstalling the add-on and re-subscribing to calendars does not work as the same problems creep back up. It's a real pity, as this add-on made Thunderbird a great Outlook alternative. Now even base Thunderbird can't sync email properly. There is no way to update or edit my Google Calendars from within Thunderbird now. Abandoning Thunderbird and this add-on soon, what a disappointment.

This review is for a previous version of the add-on (78.0.1).