It worked reasonably well for me when I was doing very explicit tdd. Write test function name, get some code to fail, get copilot to add the fix where I expected the fix to be.
Main benefit feels like a long code snippet, but the content isn't good for anything slightly creative.
Particularly, I don't think it's helpful for beginners. It's a complicated tool, and if you don't already know what you are doing, in order to identify and fix its mistakes immediately, it is going to create more problems than solutions.