As with ChatGPT, I've found that Copilot is actually deceptively difficult to master.

There's absolutely a knack to it, and the more time you spend with it the better you get at prompting it for the kind of completions you want.

I'm at a point now where I can often predict what Copilot is going to write for me - which is a HUGE productivity booster, because it means I can effectively use it as a super-fast typing assistant.

I actually do quite a lot of writing in it, by switching VS Code to Markdown mode. If I'm writing documentation I'll paste the code I'm documenting into the markdown file, write the Copilot-assisted docs and then delete the code when I'm finished.