It was a very good experience stay on Christina's place. The hospitality of Christina and Stefan was amazing. We were able to chat a little on the last night and they are two very nice people. They helped us to book a taxi at 03:15 am since we had to take a train to Paris at 04:00 and advise us about the train connections we had. Regarding the room, this one is fantastic, everything clean and tidy, it has a coffee machine with capsules that you can use. Small refrigerator where you can store some food for breakfast. We do not use it a lot but it has a good smart tv, better tv than ones in good hotels. For those who are tourists in Berlin, near the house there is a good restaurant of typical German, try to find it in google maps.