Rated 4 out of 5 stars

Very useful.

I'm using this on ver.2.0.0.21 with Japanese interface, but once in a while during while using the Thunderbird, sometimes the Nostalgy short-cuts will not work, but sometimes they will.
It looks like when you are in Japanese input mode, nostalgy won't work. When you change the input to "direct input" (I'm using Microsoft IME), then the nostalgy starts working again.

I'm not sure if this is a general phenomenon, but just a note for someone who will be using this in Japanese...

This review is for a previous version of the add-on (0.2.17).