In my experience from asking it questions about things that I know well, the deeper you get into the weeds with it, the more likely it is to invent some kind of extremely plausible-sounding but incorrect answer. How confident are you that what it told you is actually correct?
That is the one thing I think about when people say "I used it to learn X and it was very good" but when people are learning they are not in a position to to judge if what they learned is correct.
A lot of other stuff is just regurgitation of a wiki article.
Still it is very interesting and definitely a step forward.
That's what I like to use it for. To come up with plausible answers for questions that people don't have correct answers for yet, and then probe the reasons behind it. It can be very creative and insightful in such uses.
Yep, this is how I've been using it too. The responses I get are often good starting points for further investigation. Often it comes up with better terms to find the answer that I am seeking than I had originally.