Melissa had given us helpful information to get her flat before we check in. But she was supposed to let us know who will be meeting us and their phone number as she will be out that day.
Unfortunately she did not inform us how we get the keys who will be meeting us and we could not reach her before 48hrs. to check in even we called her several times plus text messages. Therefore, we had to call to head quarter of AirBnB in US.
Anyhow, we finally got reply from her in the airport just before we take off. This kind of situation drove us really uncomfortable.

Her flat was almost same as pictures, but there were only chairs with table in the backyard.
Underground is about 10mins away (2 bus stops) but bus stop is just a few steps (20 foot) away from the door.
It is very easy to get Notting Hill, Portobello Market by Bus just 6~7 stops away.

Every corner(edge) of the bed flame in master room is really sharp and dangerous, specially to the bathroom. The space is just a feet only. I and my wife hit that edge 2~3 times a day.
I highly recommend to put in the cover or guard.

Also, there are a few things to fix up such as a vey noisy fan in the ensuite bathroom, a door of fridge, and many chipped plates & cups.

Although we had some problem, we all liked her flat and enjoyed our stay.