The apartement was so nice and looked exactly like in the pictures. We stayed there at the weekend and didn't consider the noise beforehand. Although it's the 5th floor, you can still hear loud music and people screaming.
A very nice friend of Sergej showed us around, he was very friendly and gave us some recommendings where to go and what to see.
It gets very light in the morning, so it's better to take a sleeping mask with you. All in all, we were satisfied with our stay.