We stayed at Fran's place for an entire week.
About the house: Very clean, warm, spacious, and stylish place! Fran seems to be a traveller as well and it was great to see the mementos around the apartment. There's no microwave in the apartment, though plenty of pots and pans to cook food. There were clear instructions from Fran to take care of her home. The sun shines pretty brightly into the living room throughout the day. Of course, that's given when London has sun! It was a very comfortable stay for us!
About the location: close to Clapham junction station (30 minutes from Gatwick airport by train) and several double decker buses run from just outside the apartment into the city. The apartment is situated in a decent and safe neighbourhood. It isn't 'down town' with the hustle and bustle. Rather quiet and calm. In addition, there was Greggs Pastry store, Tesco Express, a pub, small restaurants, and Saturday farmer's market within walking distance from the apartment.
Would recommend for couples or single travellers. We had a great time!