The best of Santiago is far from the chaotic city centre. The residential neighboroods of Providencia, Nunoa and of course Bella Vista is where you can slowly but inesorably let the hidden beauty of this city grown into uou.
Santiago is always surprising! been there 5 times and the city is improving their infrastructure, urban mobility, security, restaurants.... the service in general could be better but you can see that they are trying!
I really enjoyed my time in Santiago, I especially liked the food options here in the city and the people were very nice.
If you're into beautiful vistas, wander around Cerro Santa Lucía. Check out the street graffiti scene. Pick up some spice packets of merkén or merquén at Mercado Tirso de Molina. Just be really vigilant in Santiago. The back of my purse got sliced open in Santiago near an ATM. (Luckily the thieves didn't get anything.)