Everything was fine. The apartment is close to Kings Cross station and it was very good for us (and the tourists).
We got around the city easily, the approach from here is very good. The area is clean and quiet. There are several shops and restaurants nearby. (e.g. Pret, Five Guys, Sainsbury's).
The staff were nice, the apartment was easy to occupy and we were able to set out to explore the city.
Thank you very much.