This is a neat little place close to groceries, and near the tube (about 10 mins walk). The Arsenal stadium is right opposite to the lane in which this property is located.
The booking was seamless, but Cathy contacted me while I was in the plane on my way to London and and I didn't have phone or internet, so unless she was home, it would have been difficult to coordinate. She didn't seem too happy that I hadn't responded to her email, and I had to explain that I had no way to communicate and suggested that she contact her guests much earlier if self check-in is difficult.
Also, the rules here are pretty strict: don't wear shoes inside the house. No guests even during daytime, or a few mins (my brother who lives in London visited briefly during daytime, and the host wasn't too happy about it). So read the rules and follow them if you want to avoid any confrontation.
Overall, great value for money - the place is clean, and organized, and she kept some light breakfast for her guests.