Rated 4 out of 5 stars

I can't place bookmarks bar items in the Vertical Bar? No point for me then.

This review is for a previous version of the add-on (0.2). 

Do you mean that the bookmark items on the vertical toolbar should be displayed vertically?
I've added a new issue:

display Bookmark Items vertically
https://github.com/gomita/verticaltoolbar/issues/4