Unfortunately, I had a very unpleasant stay in this apartment.
I had a booking for 5 days but moved out after the second night after two full nights of tremendous party noise and an overall unsecure feeling reason to an indefinably large number of people coming in and going out of the apartment next door. Music all day. Smell of marihuana in the isle.
The first night I put up with it (tired from travelling, wearing earplugs, etc.).
But it was even louder in the second night, so that at 1:20 a.m. I personally went over and was confronted with a group of (estimated) 20 people next door. They apologized and promised „to keep it down“ which they did for 20 minutes. After that, the noise levels were back to before and increased throughout the night, so that even with wearing earplugs there was no chance of sleep.
Host Prospr, when contacted in this regard, replied at 7:00 the next morning and advised me to call security to solve matters.
I did not want to go down to call security at 2:00 a.m. but I called on security at 9:00 a.m. in the morning when the party was still fully on.

I cannot say who much that changed the situation overall, because I moved out at midday, as I was not willing to take the risk of a third sleepless night.
Except for the expression of regret, I did not get help or any offer of compensation from Prospr, as „as this could´ve been resolved and the advice that we gave you [call security] was reasonable“.
Compensation one is entiteled to get via AB&B when cancelling the booking is not substantial.
This review is meant to be nothing but objective and just reports what I experienced. It is therefore necessary to also mention the following:
Host Prospr does not rent out the apartment the disturbances came from.
The apartment per se is nice and very clean and situated perfectly within the city.
The street the apartment is on is a very busy street.
Host Prospr was very well organized, responding swifty when contacted during office hours.
Check-in and check-out was easy and well managed.
Private parking was very good.