My two friends and I had a fantastic stay at Claudia and Lucas' apartment. Using their helpful directions, the apartment was easy to find on arrival. Claudia was kind and welcoming and made it clear she was available if we had any questions or concerns.
The apartment itself is beautifully furnished, warm, and comfortable. It is in a perfect location to explore Prenzlauerberg and is well connected to the other areas of Berlin by tram and U-bahn.
I would definitely stay here again.