Many times it works really well, and it surfaces the kind of example I need. Sometimes it works badly. Usually when it's bad, going to the google/sift method has similar results. Which I guess makes sense, it couldn't find much to train on, so that's why it's answer wasn't great.
One area it works really well for me is 3rd party apis where their documentation is mostly just class/function/etc. ChatGPT generally does a good job of producing an orchestrated example with relevant comments that helps me see the bigger picture.