This is a really great location. We hardly took the metro anywhere. We visited the bars and restaurants in Lastarria which was about ten minutes away as well as the beautiful area behind the flat of Providencia and Barrio Italia. The main museum of Bellas Artes was also very close by and we went on foot. Our reason for visiting was for visiting our son who lived in the central area of Santiago. We barely took the metro.
The flat is pretty spacious with two bedrooms and two bathrooms and there was plenty of storage space for all our stuff. The place was clean and airy.
One thing to bear in mind (and this is something we were aware of beforehand so it's not a complaint) is that it's a bit noisy because it is on one of the main arterial roads (Avenida Providencia) going through Santiago. However, you cannot have it all: it's very central location more than compensated. It is also absolutely wonderful value for money. We also found Felipe and Marco very responsive with our questions. Good wifi. Highly recommended. We would stay next time.