Loaded very quickly. Useful to export selected folder and contents as HTML, to import bookmarks into another profile. (Right click selection, View source, save the new page which opens.)
Bugs: (if dev had a support site would post there)
1. Folders and Subfolders are not together. Needs subfolders structure or at least show them next to each other!
2. random column widths. Some wrap, some don't. Couldn't find any UI customisation options to change.
3. Can't rename folders (requested by email) or move folders
4. Can't directly export selection as HTML (suggested by email)
5. Didn't load new bookmarks - refresh button?