Very fast speed dial implementation, and among the most customizable I've ever seen. Nesting groups is excellent and all the ways you can get good thumbnails are also effortless. The only thing I'd wish it did was save the speed dials as bookmarks, so you could sync them with just the built-in Firefox sync. But, it's great you can both export settings to import elsewhere as well as sync to a cloud solution. Assuming you are willing to trust the people running said cloud service with your data and login. When there are no ads and no obvious ways for the maker of the plugin to make money beyond donations, I start wondering what the catch is. But, this is something you have to think about for all plugins, and I really like how this one works.