If you want my opinion, I would choose this place. The house is located in a nice neighborhood really close to Kings Cross Station, where most of the underground lines are, so it is very helpful to explore London. About the house itself, it's a tradition one very comfortable and cozy.
And if you have a request or a doubt, you can ask to Marianne and she will answer in a minute.
I really liked my experience here, at this place, so I recommend you to try.