Overall, the apartment was fine. We were a little surprised about all the praises in the comments. Yes, communication is good and the location is ideal.
However, the apartment itself is average. All the necessities were there, everything worked as promised, but that's about it.
There was noise almost every night (both outside and in the staircase). Also, the upper part of the door to the apartment is made of glas, so any time someone turns on the lights in the staircase, the whole living room is lit up. The bed screaked at even slight movements. Generally, all the furniture and appliances were old/have been used for a long time, but clean and functional. The bed sheets were warm and comfy.
The apartment itself was fairly cold (it was winter), but this is to be expected in countries of southern Europe, as they have milder winters. A radiator for short, limited heating is available.
Overall, the price was fair for what we got and it was a fine apartment for a few days.