I've spent 2 months in Sally's big and cosy house. Her family is very kind, her kids are funny, and the cats are the sweetest.
The house is located in a very calm neighborhood and the transports are super close (4min-walk from the buses which take 15min to get to the closest tube station, Brixton).
Once you're at Brixton, it takes literally 10min to get to the heart of London.
Sally is a wonderful host who will make sure you have everything you need to make you feel confortable.
I highly recommand this AirBnb if you wish to have a memorable experience.
I sure had one, and won't hesitate on where to stay next time I'm going to London.