The Notting Hill studio is perfectly located; you really can't find a better spot in London to Discover the city. Communication with Max and Billie went very smoothly and the system with the key app is a joy to work with (I wish more airbnb places would work with this key system). The studio is also very clean and modern.
The only 2 downsides would be that the mattress is really thin and not great if you already have a bad back and the other small critique is that the pictures online make the studio look bigger than it actually is. ;) It is still a very small studio, only very nicely decorated with all mod cons. All in all, would definitely recommend!