I'm not a frequent Airbnb user, but as far as my experience here goes, Alvaro has been the best host anyone could wish for: he was waiting for us with a bottle of wine, maps and tips of the city and, best of all, a Neruda poem! ;)
The apartment is really nice, with a cozy and home feeling, in one of my favorite's Santiago's neighborhood, close to local restaurants and bars.
It was my fourth (and best) time at the city and if I'm ever getting back I hope I can stay at Alvaro's place again.
A tip for newcomers: enjoy Santiago with a bike! :)
Much as gracias por todo, Alvaro!