I don’t think you’ll find a better located place in Santiago as a tourist. It’s right next to Santa Lucia and 5min away from the central plaza. Also the metro ist 2 min away and important shops as well. Everything worked really well!
Two things to consider: the neighbours are often pretty noisy, singing karaoke or else, sometimes till 2-3am, nothing the host can really do about. Same goes for the pipes, be prepared to throw the toilet paper into a bin, the pipes are really old and narrow. Also something the host can’t change.
Overall I’d come back and enjoyed the little apartment in the Center of Santiago!