I did not stay here myself, but had reserved this room for a colleague. Comments were:

Flat was cozy and quite in a great location. Everything about the stay was easy and there were no problems to speak of. I would stay there again.

One thing I will add -- the place is not as big as it looks in the photos, and that one of the (single) beds in the second room is near-impossible to sleep on because there is a big heater sticking over it. Also, there appears to be an electricity problem because the light is constantly flickering in the living room.