I signed up for the free trial of GitHub Copilot a couple of weeks ago, more out of curiosity than anything else. I'm using VS Code anyway, but I see they've got JetBrains and Neovim integrations too.

For the most part it's been vaguely helpful as an auto completion tool though admittedly, it is often incorrect. Having said that, on quite a few occasions it's been so enormously useful that I'll be more than happy to put down the money for a subscription. In particular, it's saved me quite a few times from hunting through documentation for obscure syntax (and I find most documentation unhelpfully badly-written, sparse, or just difficult to search through) and it's been really helpful for writing lots of similar-but-different test code and documentation. This is because it's been really quick to learn from my own code and my corrections; it's first attempt may be just plain wrong, but after editing it the second and third attempts are usually spot on.

It can be taught!

Even when you magically hit the jackpot with a great piece of code, there's always more work to be done - anyone who's dealt with Stack Overflow copy/pasters knows what I'm talking about. So if I was expecting it to write my code for me, I'd be severely disappointed. But as a helper? Since signing up and installing the extension I've spent a considerably larger proportion of my time on the interesting bits of code and on testing. And on at least one occasion it's helped me navigate and simplify a rather complicated piece of logic while exhausted and under pressure in far less iterations than I would have needed otherwise.