The room really is beautiful. Comfortable bed and sofa, huge windows, large work desk. The kitchen is large and fully functional, including a blender and toaster. We stayed for three weeks and never had any problems. The host was out of town and renting out her own bedroom. Her roommate is kind, and keeps mostly to herself.
The location is great. Neukölln is a neat neighborhood, and there are several parks very nearby, including the not-to-be-missed Tempelhofer Feld. The subways are so easy to get to, as well as a huge supermarket less than a block away.
10 out of 10 would recommend.