Marcia is a very gracious, welcoming host. Her house is lovely and clean, and it was everything I was looking for while in London for a 6 day trip for work.
The nearest tube station (Golders Green) is a 25 minute walk away, and from there only 15 mins on the tube directly on the northern line to Kings Cross. There are fantastic bus links to both Stansted and Luton airports.
Marcia makes a fantastic cup of tea! I really enjoyed our chats, not to mention the lovely fruity breakfasts, oh, and amazing water pressure (apparently this is not so common in London)