Rated 3 out of 5 stars

The latest update actually makes it worse. Changed settings won't save. Lose the option to put the text anywhere else than the add-on bar. functions still good, but such a pain when the interface changes so much.

This review is for a previous version of the add-on (2.1.4.1-signed). 

Sorry for the troubles! Please try the latest update which has resolved these issues:
https://addons.mozilla.org/en-US/firefox/addon/reminderfox/versions/2.1.4.1