I pretty much do not have to say anything... The house is yours. Just take care of the place since it is the place where I live all year long... Please do not set fire to the flat! Do not organize crazy parties either.
And be careful with the stairs...
I am French and I lived for two years in Barcelona and almost seven years in Buenos Aires. I am currently living in Paris -from July 2014- that is why I rent my flat in Buenos Aires.
Hope to meet you here on AirBnb!