Responsive host, walkable to public transportation, historical sights and supermarkets, modern apartment with a well-equipped kitchen and high-quality utensils and amenities, the water filter is a plus, also free coffee pods and tea bags, 24/7 front desk in the lobby.
Things to note if they matter to your needs: no aircon (but there's a space heater/cooler), no washer/dryer in unit or building (laundry store 10 mins walk away), the neighborhood is residential but doesn't feel safe to walk around after dark, decent cafes and restaurants are 20+ mins walk away, the studio is functional but bit small (about the size of a hotel room).
I still give it a five-star rating because it's definitely good value for money for sightseeing or short visits where you just need a comfortable place to rest and sleep. For longer stays, I recommend more convenient, cleaner, and safer areas such as Providentia, Las Condes and Vitacura.