Rated 3 out of 5 stars
A fantastic idea and certainly does what it says, but I would like:
1. The option to have the standard Thunderbird compose GUI.
2. Be able to add/remove buttons (cut, paste, spellcheck, find, font, etc).
3. Tooltips to explain each of the buttons.
4. A help file.
5. Make the GUI smaller so there is more space in the message body - I'd rather read what I'm typing than what I've entered in the to: cc: bcc: fields.