I have used Copilot during the beta - strictly for personal projects only as GPL'ed code is not allowed in my org. It gave the best code samples for Python and JS, but only for really simple algorithms and coding patterns. Oftentimes, I was given code that would not compile due to missing variable names. And that's not to mention the snippets did not entirely follow best practices for the particular library or framework it was suggested for.

So it's not on par with a professional developer yet. It's more like a monkey typing pseudorandom garbage text in a code editor - it cannot make a sophisticated program by itself.