Rated 4 out of 5 stars

This was a good spell-checker. For some reason, it isn't compatible with Thunderbird 2.0.0.23, which is the version in Ubuntu (Linux) Karmic, but so long as you have myspell-en-gb installed that doesn't seem to be a problem.

The myspell vocabulary doesn't seem to be that large - words like "interpellate", "rowlocks" and "ericaceous" are marked.

This review is for a previous version of the add-on (1.19).