Blue is a relatively new tool, so there are features that are still in planning or early stages of development. Nevertheless, the features it does have already make it useful for everyday use, and are SOLID: stable, intuitive and very helpful. Any issues I've reported to their Support Team have been answered promptly — in less than a day — in a super friendly and welcoming manner. The way they participate in their Community forum discussions, welcome suggestions for new features, and regularly update both their Roadmap and Changelog, hints at a stellar future.