The appartment is really well located (the exit Largo de chiado at "Baixa-chiado" subway station will be your best friend!) almost on top of the west hill and close to many attractions.
It is well kept and has all the amenities needed (dishwasher, laundry machine, iron...).
Nuno welcomed us on time, showed us the place and advised us some place to see. He also was always easily reachable during our trip if needed.
The only downside is the noise from the appartement upstairs...if you are a light sleeper and if the airbnb upstairs is rented by party people you won't sleep well since you will hear their foosteps at 4am.
It is too bad since the street is extremly quiet and everything was perfect otherwise.