Martina is great! A very pleasant person and her recommendations are very useful! She is very responsive and helpful.
About the apartment... It's close to the center, either by u-bahn or tram (10-15 minutes). The neighborhood is very clean and also quiet, with beautiful buildings. The apartment has everything you need. You can cook if you want to, there is also a supermarket very near. The bed is comfortable and the room is beautifully furnished.
A great place to stay when you visit this beautiful city.