I strongly suggest this flat: Hannelore is a very nice host and the apartment is very good and very clean.
She was very kind and provided all the information on time, and even when there had been a small misunderstanding regarding the self check she was available to help us by phone, so everything turned out fine.
The position of the flat is definitely not bad, as soon as you get accustomed to going to the U3 stop (it requires walking few minutes) to go to the city center, or taking the tram if you need to go to the main train station.
I would definitely make the same choice again