This comment (this one right here) wasn't written with GPT, but I did have the other one refined by it. I think in elongated thoughts and a lot of continuations, which makes me a bit shy of my writings. Because of that, I use it to help me find different ways to improve my writing.
I live near UCI and yes, I can find one, but at a sizable cost. I'm not opposed to that, but it's still a good chunk of money.