Adds convenience of another tool bar without without wasting screen real estate Rated 5 out of 5 stars

Combines well with: Buttonizer (select Vertical Toolbar from Buttonizer's option menu or add Buttonizer to vertical toolbar to save even more screen space) Note that the first option requires resetting Buttonizer before being able to customize VT.
A few suggestions for future versions: option to have multiple VTs, option to have VT display from both right and left (don't think it would be particularly useful, but someone else might find it so), toolbar button to toggle VT's visibility, option to force status bar icons to display vertically on VT (don't know enough about coding to know if that's possible, but would be helpful if it is)
Minor bug: the icon for the i2Symbol extension appears squished when added to VT

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