Rated 4 out of 5 stars

Pros;
-Works great, saves hours of work.
-Easy to understand.
-Many options.
Cons;
Will not import messages from a single mbox file (forwarded from an account, to the same account.) e.g. account01@mail.org sent to account01@mail.org

This review is for a previous version of the add-on (3.2.4.1).