I arrived in Paris via train and asked Caroline for directions prior to arriving. She provided very accurate & easy metro directions - there is a metro stop directly in front of her building, but if you're coming from the airport or train station you'll have to take a different line. No more than an 8 minute walk, though.
The outdoor area is huge and there's space to eat outside, weather permitting.
The neighborhood is a little transitional, but nothing to be worried about if you're used to city life.
Plenty of restaurants within walking distance and short metro rides to the rest of the city.