I stayed 3 nights for a business trip in Sara's flat. She is a great and helpful host and very reactive to answer.
The flat is very cute, very bright and good value for money.The wifi works very well and Sara left an adaptor and a metro card that you can top up if you want to take the metro. There is a Concierge Desk at the entrance of the building which makes it very safe and secured (as I was a foreign woman travelling alone for work).It is located in the Centro of Santiago and the area is safe and convenient. You can walk around easily and you will find in the street ATM's, a exchange desk, Starbucks, mini-markets, a bakery for example. As a tip to take a taxi, I used Cabify (EasyTaxi App) when I wanted to take a taxi to go around and it works well.
Enjoy your stay!