It helps me a ton, but I suspect that's because I disabled auto-suggest, so it only gives me a suggestion when I specifically ask. I know by now what kinds of problems it's good at, so I can selectively prompt it when I know I'm working on something that it will able to do faster.

One example is when working on a front end form in Vue or React: if I have a bunch of variables in the component state and create a form tag, Copilot is great at creating all of the inputs with the correct bindings and input component types, so I'll usually prompt it after creating the first one by hand as an example.

Since I'm selectively prompting it instead of just letting it suggest left and right, I also find it helpful to sometimes write out a quick comment explaining what it is that I want in more detail than the function name can provide, then prompt it on the next line after the comment. That often helps to get better results, though I'm still careful to read through everything.