Marc's apartment is great! It is modern, clean and comfortable. It is also recently updated and well equipped.
Richmond is a great area and the apartment is located close to restaurants, shopping and the train station, yet on a less busy street so relatively quiet by city standards. (It's impossible to be both centrally located and completely quiet in any major city)
Anytime we had a question, we had a quick response.
We visit London every few years and will definitely look for Marc's place the next time we are in town. It is hard to beat.