I'm finding myself reaching for it instead of Google or Wikipedia for a lot of random questions, which is pretty damn impressive. It's not good at everything, but I'm rather blown away by how strong it is in the 'short informative essay' niche.
It wasn't that I didn't know the stuff, I do, but more helpful with quickly organizing and presenting information in a clean and well-written way. I did have to go through and re-write parts of it specific to our domain.. but it saved me many hours of work doing tedious organization of data.
I also tested it with helping create some SOP's for a new position in our very small company, even breaking down the expected tasks into daily schedules.
It's not that it's perfect, but it generates a bit of a boiler-plate starting point for me which then I can work with from there.
It allows you to explore topics that are well understood, in a way that fits your own understanding and pace. It's like somebody writing a great mini-tutorial on topics you're interested in, in a pace and abstraction that suits you.
Examples for me are concepts of mathematics or computer science that I would like to freshen up on. Things you could also ask a colleague over lunch, or find eventually via searching Google/Youtube/Wikipedia etc. Just much faster and more convenient.
Often I have a specific question like how does X relate to Y. And usually the answer given is total nonsense.
I'd argue with "fact-based". It frequently makes up facts (and even sources!) as it generates text. Also you should consider the possibility that "the facts" it generates can easily be a part of a tabloid article or a post on some "Moon landing was fake / flat earth" blog.