Instead of a REPL, it compiles and executes at every cell execution. This allows compatibility even when importing packages with CGO. Go compilation is fast, so it's very interactive.
Rich content (html, images, svg, etc.), including dynamically updated html content.
Auto-complete, contextual help with gopls.
Support for bash commands -- handy at times.
Also works with Github Codespaces, VSCode (or so I heard), and with Google Colab (a bit tricky, but it works).
Feedback, issue reports (or feature requests), and contributions are very welcome.