It is not the most quiet area of the city. There is a police station over the street, and they don't always care about some tourist's good night sleep.
But after one night of acclimatization I got used to it.
There were two other guests staying in the flat when I was there, both were very nice, and with Anna also being around from time to time there was almost like a shared flat, which I enjoyed.
Anna is a fun host, so I recommend you give this apartment a try.