Yes I (try to) use them all the time. I regularly compare ChatGPT, Gemini, and Claude side by side, especially when I sniff something that smells like bullshit. I probably have ~10 chats from the past week with each one. I ask genuine questions expecting a genuine answer, I don't go out of my way to try to "trick" them but often I'll get an answer that doesn't seem quite right and then I dig deeper.
I'm not interested in dissecting specific examples because never been productive, but I will say that most people's bullshit detectors are not nearly as sensitive as they think they are which leads them to accepting sloppy incorrect answers as high-quality factual answers.
Many of them fall into the category of "conventional wisdom that's absolutely wrong". Quick but sloppy answers are okay if you're okay with them, after all we didn't always have high-quality information at our fingertips.
The only thing that worries me is how really smart people can consume this slop and somehow believe it to be high-quality information, and present it as such to other impressionable people.
Your success will of course vary depending on the topic and difficulty of your questions, but if you "can't remember" the last time you had a BS answer then I feel extremely confident in saying that your BS detector isn't sensitive enough.