Carmen's place is simply the best. Excellent neighborhood, great restaurants nearby, clean, and without exaggeration, THE MOST COMFORTABLE BED AND LINENS ever. Carmen is the most responsive, welcoming, hospitable and kind host you'll have. She made herself available to us multiple times for questions, recommendations and requests. I can't recommend her and her place enough. We will be talking about our time in Berlin for months thanks to the beautiful experience she gave us.
Close to Ostkreuz station which takes you all over the city -- 10 minute walk MAX which is just perfect.