The street can be quite loud on the weekends (loud music and noise throughout the night until the morning).
The staircase was quite dirty and steep (as well as the street) - can be a problem if you arrive with heavy luggage.
Also the apartment looks way bigger on the photos. Inside it did smell a lot once the windows were closed and the sofa was not very inviting due to lots of stains.
Location of the apartment (apart from the noise) and communication before and during the stay was good.