Github Copilot is on the fence for me between yes/no at $100 per year. I agree that you should rarely if ever allow Copilot to write multiple lines, as your double-checking or debugging time is going to exceed your time savings — the probability of good-looking but bad code is just that high right now. In order to experience a net time-win you'll likely want to be an intermediate at whatever you're doing.

If it were $60 yearly it'd be an auto-yes for me.