The house is lovely, in a nice neighborhood (close to a number of restaurants and supermarkets), and Caroline is a great host, who did her best to make our stay comfortable (provided information on every possible service). We couldn't meet her in person, but her friend Anne was very helpful as well.
Although in zone 2, the flat is well connected to every major attraction (overground and underground are a few minutes walk away, or you could take a bus).
I would definitely recommend her place.