Everything the other reviews have said is true. The hosts are amazing, they hoisted our 50 lb bags up and down the stairs like it was nothing! The flat is super clean and welcoming and they lightly stocked the fridge which is such a nice touch.
Unfortunately the walls are so thin that we had a very hard time sleeping due to the noise from both the hall and the other apartments. The people were not especially loud, the noise just carries. Additionally, you should look at the pic of the bathroom again, the toilet is very close to the wall and only suitable for small people. Lastly, the sofa bed is both uncomfortable and noisy (needs to be oiled maybe?).
The hosts and the flat are so nice that we hate to say anything that isnt a raving review but I would have preferred to know this before booking.
Last note, the location is great and there are some fabulous restaurants on the same street in addition to the recommendations Manual gave us. We walked everywhere.