My eleven years old sun and I just returned from our long-weekend journey from London. Regarding location, I think all is said by my previous speakers here: You won't find a better place!
As we have been really tired at our first day, we just paused the London bus tour and rested our legs for an hour, and got back to the streets afterwards.

Her flat is really cute, nicely equipped, silent, has a really comfortable bed and the little balcony to the back of the house is filled up with plants.
The kitchen/living room is cozy and has everything you could ever need.

Speaking about our host Phyllis, there is so much to say: she is awfully nice, you feel at home right after the first moment, she is really helpful (tried even some english teaching to my son), has so many interesting details to tell about her caring life and the very interesting work that led her to many parts of this world, I wished we would have had some extra evenings just for talking.
She also has some nice extra tips regarding what to do in this city, and she likes to share them with all the guests to come.

To sum up, if you have the luck to be able to book this place, do it early enough as her guestbook is quite full!!