We booked for four nights but asked Guille after the first one if we could stay longer because we loved it so much. The apartment is very charming and located in San Telmo where there's a lot of stuff to do - lots of bars, restaurants, markets and sometimes even concerts on the street :) The apartment was very clean when we arrived and we got fresh towels and soap.
Guille was a really great host, he helped us with recommendations about the whole place, taxi services from the airport and when there were any questions we could count on a quick answer.
Muchas Gracias!!