Rated 4 out of 5 stars

first of all - thank you for this add-on, its easier than sending emails with send later as reminders with a one-click approach.
caveats (with thunderbird 52):
- reminder window makes all other emails in inbox disappear via a filter, need to rest the filter to see them again.
- really missing the ability to stand on the folder storing the reminders to see a column with the reminder trigger dates, like SendLater has.

This review is for a previous version of the add-on (0.7.9.4).