Import from KeePass could not cope with multilevel folders, just imported empty folders. You cannot delete a folder AND its contents, so the only choice is to purge and reimport every time. Folders are very clunky, no drag and drop for example. But worst of all, Firefox Extension won't display any contents, despite uninstalling, reinstalling. Its syncs happily and will even add new items to the web vault, but the contents of the Web Vault refuses to show. All in all not a great experience sadly.