Fantastic location!
In order to see the city, our preferred transportation was a double-decker bus. Steps down the road were bus stops that would take you anywhere. On day one, we went to the theatre, and it was one easy and scenic bus away. Day two was the British Museum; again, it was only one bus away.
If you have to get to the airport or somewhere quickly, the tube station is a little further away, but still very close and walkable with luggage.
For breakfast, we enjoyed Mariana Cafe each morning, which was a few minutes walk away.
While certainly not a luxurious flat, it met all of our needs and proved to be a great 'base camp' for our trip.
We would certainly book again!