Sarah's place is exactly as in the description. It is a simple room in an apartment with three more rooms, two shared bathrooms (one big, one small), and a kitchen. The only downside of this room (#3) is that the boiler is inside the room (I don't know how safe is this) so you will sleep with the boiler exactly next to your head and you'll hear noises coming from it every time someone opens a tab. Also, as people use the kitchen until late hours it can get noise as well.
The location of the apartment is great, very central, and easy to access. The tube is just 3min away! Communication with Sarah was always fast.