I spent three nights with a friend in the Tatiana's apartment for a short holiday. The apartment is located in a residential and quiet district of London but well served by public transport (the metro stop is not even 5 minutes on foot) and full of shops and restaurants.
The apartment although a bit small, is very comfortable, clean and well maintained. (In the bathroom at least there is no moquette loved by Italians).
Tatiana is a great host. Fun and available for any occasion.
I would highly recommend her apartment for couples of friends.