We had a wonderful time in Rich's flat. The location was far enough from the busy and crowded dead center of London but was still a very short tube ride away from everything. The inside of the flat is also very nice. It's decorated in a modern style and was very comfortable. It was nice to have a separate bathroom from the kids.
The only negative comment I have is that the building was a bit difficult to find. Google maps shows the wrong building for the address and the number and address are written in such small print on the building that we circled around for an hour before finding it. The best description of its location is that it's right across from Pimlico Grocery and in front of the door to the building is a metal bench with a metal sculpture of a girl.
It's a bit pricier than some other flats found on this website but the location is great, the tube is close by, the flat is clean and well stocked and decorated, and Rich was in constant communication the entire time.