The staff were great, friendly and helpful. The room was small but generally okay. We would have appreciated more surfaces/desks/tables etc to spread out our stuff. When we first saw the room, we were dismayed to discover that the railroad tracks for S-bahn and intercity trains was more or less right outside our second story window, as we were worried about noise. However, the place was amazingly soundproof. You could barely hear the trains -- a good thing because they went by frequently.
The breakfast was expensive, so we didn't take advantage of it. Found a cafe about 150 m around the corner instead. However, in general, there are very few restaurants or other services in the area near the hotel. It's a pleasant enough residential neighborhood but very quiet. The closest SBahn station (Bellevue) is a ten to fifteen minute walk. On the other hand, it's only about twenty five minutes to the Hauptbahnhof (Central Station). We walked there with our luggage when we were leaving.