Absolutely perfect. Paul is gracious and welcoming, and he obviously takes pride in being an outstanding host. Communication was easy, frequent, and thorough; he even tracked our flight to know when we would likely be arriving, and he was waiting for us. He even gave us a lift to the best nearby pub, which was such a thoughtful thing to do for a couple of weary travelers who wanted nothing more than a nice pint after a long day of travel.
The space is comfortable, spacious, private, and well appointed. The location is terrific: two minutes to the Tube station in a neighborhood that had everything you could possibly need within a short walk (fruit & vegetable market, co-op grocery, laundry, and a gorgeous butcher shop that sells lovely meat pies and sausage rolls). It's also very handy to Heathrow, but still close enough in to the heart of London.
Six stars (out of five) on all counts!