I’ve used one once by accident (booked through a different website) and it was just someone’s spare room, which I found pleasant. Then they charged me for a beer that evening and breakfast the following morning, which I found bizarre.
They sent me a menu when they confirmed the booking and asked me if I wanted anything when I was there. They’d bought in soy milk I think it was because I’d asked if they had a vegan option, which was nice enough of them.