Robert's place was indeed a spacious, warm and homey place. It was located in the basement of a beautiful historical building. The owner appeared to be a car fan the flats are filled with car pictures, souvenirs and models. You felt like the owner was still living in the house yesterday - coats in the wardrobe, purse on the shelf, and games in the PS (3?) console. There was also a sophisticated entertainment system - only that it was too sophisticated for a short-term visitor to operate.
The location was right next to Harrods and a couple minutes walk to Piccadilly line subway station. Robert was also very nice to let us check in early so we could drop our luggage. The only issue we had during our stay was that there was no Wi-Fi (there was a router but no Internet) while mobile reception was not good in the basement.
Would strongly recommend this place to my friends if they visit London.