Copilot shines with a number of things and isn't very good at a number of other things. Whether you get value out of Copilot says more, I think, about the kind of work you do on a day-to-day basis than it does about the utility of Copilot.

Copilot/GPT is excellent at writing lots of new lines of code. It's also really good at getting you started in code/frameworks that you don't really understand.

However, Copilot/GPT is not nearly as good at troubleshooting problems in existing code. If your job involves lots of bug fixing or tweaks to existing features, Copilot and GPT are next to useless.

I've noticed that if my work falls into the first category, Copilot often speeds me up something like 30% to 40%. If my work falls into the second category, it's 0%.