I highly recommend Guido's apartment! It is as centrally-located as you could want, and yet the apartment was quiet and felt peaceful. The apartment is exactly as advertised: very clean, well-furnished, and with great amenities. It was a good size for two people to stay comfortably. Nice television, kitchen, couch, and there is a washer and dryer in the building. All of Berlin feels easily accessible and it was a great home base! We would definitely stay again next time in Berlin!