My boyfriend and I stayed in Sabine's lovely apartment for a week and had such a wonderful time. Sabine was a fantastic host, she met us at the house and gave us a tour of the apartment and some suggestions for where to go for food and nightlife.
Her place is very comfortable and cozy. There is a nice kitchen with everything you need to make a home-cooked meal, a large bathroom with a shower and a bath, a washing machine if you need to do some laundry and a big open space to relax, watch movies or sit out on the balcony and enjoy the sun.
The location is really perfect, with lots of bars and restaurants within walking distance. It's tucked away from the main streets so it is never loud at night. There is a U-Bahn stop very close (only 2 mins walk) to give you access to all areas of Berlin. There are a few stores nearby that are open nearly 24 hours for late night snacks and early morning coffee.
We had a fantastic time and felt like we had a nice little home away from home here. Highly recommend! One quick tip: be sure to take your shoes off when you're inside, as there is a family with a young child that lives below!