We had a really good Time in Ksenias & Arts Appartement! The Communication with them was outstanding. They always answered very quick and super friendly. The Appartement was very clean and very nicely decorated. Maybe its good to know, that the flat is kind of in the cellar, but there are skylights that can also be opened and there is enough light.
The Appartement is very good located: The Mainstation and a metro Station are super close. The National Museum is just around the corner and there is a new Ramen Shop next door. There are also plenty of Cafes and Restaurants within walking distance. I would totally recommand to stay here and would stay here again if I visit the city again!