We have used Airbnb all over the world. Sergio stands out from the crowd as the best host we've ever encountered. Nothing was too much trouble. Communication was excellent and he provides a superb travel guide/tips document before you arrive. Cocktail making was great fun and a good way to get to know him more.
The room was clean and offered excellent views of Christ the Redemmer from the bed. A swim in the pool under the stars is a must.
The location is perfect. Security is 24hrs, the underground is 5 minutes away and the beach is 4 blocks away, what more do you want.
Don't hesitate, book up now!
P.S. if you ever get to met his mother, she is a delight.