Another Great One Rated 5 out of 5 stars
I am currently using Multirow Bookmarks Toolbar which is probably my most used add-on but I had to see what else you've come up with.
I didn't have any negative issues with Vertical Bookmarks Toolbar. It's a great add-on with a lot of options to view and hide bookmarks.
The only problem that I faced was choosing between Multirow Bookmarks Toolbar and Vertical Bookmarks Toolbar. i chose Multirow Bookmarks Toolbar. :)