Hosts:
You can't find nicer people. Even though Guillaume and Nga were away during our stay and I didn't get to meet them myself, we were in constant contact. They responded to every question very promptly and very accommodating in every way. They left a booklet full of information about the house, appliances, things to do/eat, places to visit, etc. Very professional, at the same time a considerate gesture. They asked a friend to wait to check us in, and he was also very nice, taking his time to help us comfortably settle down.
Flat:
The floor area is moderate, a good size for London property. One bedroom, one bathroom, and one cozy living room. They're all comfortably proportioned. The floorplan is also good, a nice separation between living area and bedroom.
Location:
The best. As many other reviews have said, the flat is steps from Westfield shopping mall. On rainy days, I didn't have to worry I'd waste my precious time stuck at home. The mall opens until 10 PM so I also had plenty of time to shop even after my day's trip. The flat's within walking distance (4-10 minutes) to at least three tube stations. I took a tube from the airport in less than an hour. It's also near a major bus station which is the terminal for many bus routes that could take you to all the attractions. If you pick a place closer to the center, you might save ten or so minutes of commute time, but you sure have to risk standing on the bus every single day. While staying here which is still considered quite center, you have your pick for the best seat on the bus. Considering the amount of walking you'd have to do each day, it makes big difference, trust me. With all being said, the neighborhood is residential and quiet.
Facilities:
The flat is perfect for our family of three. The sofa in the living room is large and comfortable to sleep in. The main bed is super comfy. Everything you'll ever want in your hotel room and more. Big screen TV with nice sound system, basic cable, fridge, microwave, dishwasher, range, oven, nesspresso machine (with capsules fully stocked), hair dryer, iron, washing machine, vacuum. This is not the place the owners just rent out, but they also live. So everything is not just there for the sake of being there, but fully functional. I felt absolutely at home staying here.
I can't recommend this place highly enough. Fortunate for me as well that the first time in London and I hit a lottery with this place.