Positive:
Neighborhood, location
Instant booking
Smooth handover of keys, (although the returning them required me to leave them inside the flat and leave everything unlocked. I was later blamed when the door was open in the end)

Negative:
Extremely small place (basically it's a modified storage room). Almost unbearable if the sofa is pulled out.
Blinds were see-through and not adjustable, so that workers outside the window could see in every corner of the flat, including the bedroom. Plus, limited light from outside left the place semi-dark.
Heavy and very loud construction work on the building started at 7am.

Considering all factors, I believe the apartment is heavily overpriced.