I have had amazing airbnb hosts in South America, but usually these hosts are essentially running hotels. Hosts in the US were the worst. One host in NYC, whose slum apartment I stayed in for a few weeks, checked up on the apartment several times while I was at work to turn off the air conditioning (that I left on to avoid coming home to 85 degree heat). Another charged a $300 cleaning fee for a week-long stay, and then complained to me that I left dirty dishes in the sink - apparently they didn't come clean the place for several weeks after I left.