Mara's place was a convenient stay and fairly comfortable. It is close to a few bus routes, perhaps most notably the 113 line which will take you to an "underground" subway station. From there, it's just 5 or 10 minutes to reach central London. Very easy.
Mara is a great host. She made sure everything in the room and bathroom were set up perfectly for me, and even provided a wonderful small-scale Sunday breakfast. That being said, it was a little cold in my room and in the bathroom, but I think she might have fixed that if I had just asked.