I stayed at this hotel over a new years. The hotel is clean, but pretty far from city center. Although it's not such an inconvenient location because Berlin has trams, buses, trains (really fast and efficient public transportation). The hotel didn't provide much other than a clean bed and some heat from the cold weather. It provided breakfast for an extra fee, but we opted to eat elsewhere. I don't believe they had wi-fi. In the area of the hotel, there are some shops, supermarkets, etc. I would probably recommend a friend or family member who was visiting Berlin to check out a hotel closer to city center. Although, if they were securing a fabulously low rate for this hotel I would recommend it.
Overall, it's clean and a place to sleep. What more do you need? If you were looking to shack up in your room all day and night, I supposed you wouldn't be in Berlin but in a resort!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC