Nice flat, clean and confortable. Not the best option if you want intimacy since there is no actual bedroom, just one room with the bed and the sofa. However it was not a problem for us, we were 4 friends and we had a good experience in Alina apartment. We didn't personally meet her but she gave us all the information requested by mail. And about the location is pretty central, about 5min walk from Check Point Charlie. A good option for visit Berlin