The flat is everything you can ask for, if you look for an affordable, clean and cozy place with excellent traffic connections.
When we (family of 4) first looked at the pictures of the neighborhood, we had our doubts, cause it has kind of a "rusty charme", but it is actually quite nice. Stores, supermarkets and some places to eat are right around the corner. It's a 15 minute walk to the subway, but I would highly recommend taking the bus, which stops right in front of the building. It will take you directly to the heart of London (e.g. : Waterloo Station in 20 minutes). Plus....bus is cheaper, not so crowded and you see a lot more of the city.
The place has everything you need to survive and enjoy your trip to London. Beds are comfy. I would recommend the flat for 4 people max., maybe 3 adults max., cause of one bunk bed. All beds are 200 cm long, though.
Last, but not least, there is your host Juli. She is a total delight, very nice and always there for you, if you need help or have a question.
Simply put : this is a great example, how an AirBnB-experience should feel for you. Thanks for having us, Juli.