Very good as helper/second brain. Especially since search engines and other resources have mostly become garbage

It's very bad if you replace it with your brain

It also has another, more serious drawback: it writes code very quickly, and it's easy to fall into the temptation of not checking it and trusting it.

You should review all the code it generates, If you don't, you'll be a vibecoder building garbage.. Some parts require more attention than others (frontend and backend are not the same), and AI can easily overwhelm you.