Rated 4 out of 5 stars

I really like the idea behind this add-on, but it lacks a proper user interface. Currently, it's definitely too complicated to add notes.

What I suggest is the following:
- A new note is created, when I click in the XNote-area in the e-mail-list.
- When I move the mouse over it, the XNote-icon should be visible, possibly in a greyed-out way.
- The context menu item should be below the "open message in new window"-link, not above.
- Call the notes "Notes", not "XNotes". (For consistency and better integration.)

Except for these issues: Great add-on!