This is same as pictures that you saw in airbnb. Interesting experience to live in basement for a week, but I would prefer to have windows in the apartment to have better ventilation. If you care about this, you need to pay attention.
The apartment is well equipped and matching with descriptions.
Walk about 10-15mins to the closest Old Street station, and there are some bus stops closed to the apartment.
Nearby the apartment, there are local shops and supermarkets, very convenient.