What features does the editor support?
Text formatting, lists, quotes, code blocks, tables, images, embeds, and arbitrary HTML blocks.
Can I arrange elements on a canvas in arbitrary ways?
No, Brick is a document-based rather than canvas-based editor. It's a tradeoff — Brick is much simpler to use than canvas-based editors, but it might not be the best choice for e.g. complicated landing pages with specific design requirements.