This is a decent bookmarking app, but there are two areas that could be improved:
The app is entirely website-based, meaning you have to log into their website to use it. The browser extensions don’t seem to do much besides allowing you to add bookmarks; you can't browse them from within the extension. Clicking on the Bookmarks link just takes you to the website.
My biggest issue with the service is that it requires you to use either Google or Microsoft email accounts. You’re not allowed to use an email provider of your choice. Additionally, once you log out of your email account, the Bookmark Manager also logs you out after a certain amount of time, forcing you to log in again. This is especially inconvenient for those who use desktop email applications or different email providers.