Tessa is a very nice and helpful host. Even though we haven't met her, she replied very quickly via texts to any question or request we had. She was even there for us when we checked in at 1:30 am.
The flat is 10 minutes walk to trendy Camden market, and 5 min walk from the tube and bus stations. Navigation from it to all parts of the city is very easy and convenient.
The flat itself is very clean and comfortable, but a little bit on the small side. The main room is large enough for two people but the mattress is small and the kitchen is very narrow.
All in all, we had a great 6 days visit in London, and Tessa's flat was a very good base for touring the city!