The house was great, very central and literally opposite the S-bahn. Only problem was that it could be a little noisy in the living room at night with the trains going past. Melanie was very responsive and check in and out went smoothly. The only thing I found slightly misleading was that the two 'single' beds in the second room were actually single beds attached together in a double bed frame so not appropriate for two work colleagues to share as we expected. Not a problem though, we used the spare bed (in the living room).
Overall - nice apartment, great location, great stay.