We really enjoyed our stay at Sophia's place. She was really helpful and friendly but still gave us privacy. The room is a good size and has everything you need. The bed is comfy and the apartment is tidy. It is in a great neighbourhood as it is close to everything you need including public transport connections to Mitte and the tourist sites. You can also just explore the surrounding shops and restaurants etc on foot. We would really recommend a stay in Sophia's apartment.