The apartment is located in the old city centre, close to the Central market. It is directly above a storage unit and in the back alley, directly underneath the windows, there is a whole row of garbage cans. The first issue with this is noise - there are metal pull-up doors directly underneath the apartment and every time someone pulls them up or down, the noise is very disturbing. And they pull them up or down even in the middle of the night or at 6 in the morning and throughout the whole day. Also, between 11 pm and midnight the garbage cans are cleaned, which (again) isn't particularly quiet. There is also a glass wall that separates the apartment from the staircase and as people are walking in and out the storage below (which again, you can hear very clearly), the lights are being turned on, and as people are coming or going throughout the night, this means that if somebody sleeps on the couch, he/she sleeps practically with the lights on. The feeling is pretty much the same as sleeping at the airport.
The second issue, which was even more disturbing, was horrible smell coming from the storage unit. The stench was pretty much unbearable. Right below the windows the storage unit below is separated from the appartment only by a wooden board - if you lift it up, you can see in the storage downstairs. We didn't find out what the source of the smell was but it was very pungent and unpleasant. We tried to stick the towels in the crevices between the wall and the boards but it didn't help much.
I must say that we were quite dissapointed... We travel a lot and have seen many different airbnb places, but this one was the first that I would not recommend for more than a one night stay...