Rated 4 out of 5 stars

Conversations really helps you keep track of your mails and their context - it gets rid of the old Thunderbird problem that there was no easy way to jump to a sent message with the same subject, for reference purposes. It's really well thought-out and the switch was very seemles to me, although this plugin offers quite a paradigm shift in how you work with your mails.

However, if you write a reply to a thread and somebody replies before you're done, your draft is lost. I'm sure this can only be a temporary issue that will be fixed soon, but for now it makes it kind of dangerous to compose longer mails directly inside Thunderbird.

This review is for a previous version of the add-on (2.8.1). 

This is tracked as https://github.com/protz/GMail-Conversation-View/issues/730#issuecomment-54701790 ; any help is welcome as I currently don't have much time to fix issues.