It's a good place, near to Paddington station. She lives in the apartment number 1, so you will be below the street level. There is one window with a view of the street, one heater, books and so on. Salwa is a really nice person and tries to make you feel at home (and I did!).
The bathroom is shared between you, her and other guests that may be using the other bedroom.
She smokes, but that's not a problem, just keep it in mind in case you don't like the smell. She only smokes in one place with closed doors, so you will not be exposed to the smoke, but you can smell it when you get home, just like any other smokers home.
Everything was pretty good.