The location is superb. Islington is a true gem. Lots of great restaurants and sites in the neighborhood. Make sure to check out Pophams across the street, one of the best bakeries in London.
The flat is very basic but clean. It is clearly a professional Airbnb (not someone's home). The host had good communication and we were greeted by a friendly and helpful person. I would recommend this flat as a crashpad for exploring the city. I don't think it would be all that comfortable to spend a lot of time in (the sofa was quite uncomfortable). Overall, a positive experience!