The host is very reactive, and the balcony is nice. It should be a nice flat for summer / spring. Nevertheless, during autumn / winter, the gaz heating system doesn't work. The machine is not big enough to warm the apartment, so the max temperature you can have during cold days will be 10/13°, and it is not possible to let it on during night for safety reasons (gaz can explode) so temperature can fall to 5° during night...
The host said they will make some changes to the heating system, and it is necessary because our stay was in autumn, so I think it would be worse during winter. I recommended to put an electric warming in complement of the gaz system for the night, and only allow a bill of 50K chilean pesos max of electricity (the goal of the gaz heating system is to lower the displayed price per night in order to rank better on Airbnb).