I have been using it for the past week or so and I must admit that this tool is really cool in terms of usage. You may not want to switch to a browser to raise a pull request separately.
It is available for Windows, macOS, and Linux and the most importantly an open-source tool. As they say, this tool takes care of pull requests, issues and most of the GitHub concepts.
Go ahead and try yourself out.
Happy learning and stay fit and healthy