I spent 3 nights at Viviana's place. The apartment is well located in Recoleta - a safe and centrally located area.
The space itself is stylish, spacious and comfortable (I travelled solo, but it's a great space for couples travelling too). Viviana was lovely to deal with, as was Adan, the building manager, who was always helpful despite a pretty big language barrier for me.
Other callouts are that I was able to check in basically in the middle of the night - thankful for flexible check-in. And was able to store my luggage the day of checkout as I had an evening flight.
All in all, a great place - recommended!