Gus is literally The Man. He was there when I checked in, gave me tips and maps of the local areas, told me about some great restaurants to go to as well as tours to do, and was incredibly responsive during my week in BA. I could send him a message asking for a dinner recommendation at 9:00 PM and he'd get back to me by 9:10 with a bunch of spots near where I was to try, and every recommendation he gave me was spot on. Definitely the best AirBnB host I've ever had. If you're traveling to Buenos Aires, you can't go wrong staying at one of Gustavo's spots.