I stayed for a whole month, it was great and the communication with Sevi was super easy. The location is amazing since the metro which will connect you to anything in the city is only a few minutes away. But you can also walk to any tourist sight since it‘s not far as well. Just outside the flat are lots of bars and good food options (vegan as well). A super market is also about 5min waking distance away.
As for the apartment itself: It was clean and had everything you needed, the maid was super sweet. Of course the balcony is great, especially for winding down in the afternoon or in the evening. I was very glad that the building had a lift since we are located in the fifth floor. The bed could be a wee bit more comfortable but for a one or two week stay it’s perfectly fine.