We had a wonderful stay in Toby's flat. The location is amazing. We were able to walk to almost all of central London, and when we needed the Tube, we could walk fairly easily to the Covent Garden, Leicester Square and Holborn stations.
The kitchen is a bit cramped, you wouldn't want to do a huge amount of cooking in there, but overall the flat is excellent.
In addition, even though Covent Garden is a busy neighborhood, the flat is overlooking a fairly quiet street and is close to soundproof. We thought it was a really wonderful place to stay for our 8-day exploration of the city.