That would be a fine enough 3-star hotel if not the fact they position themselves as 4-star. But they are clearly not. The major problem is no good ventilation and no conditioning, thus tenants use windows to ventilate. Since the river is within few dozens meters, that opens, well, a door to all types of insects. Fortunately, those were mostly butterflies and moths of different sorts: ex-butterflies, almost-dead-butterflies, still living butterflies. Cleaning is inadequate since, not mentioning heaps of dust in distant places, I was forced to bury (=throw away) a number of ex-butterflies scattered on the floor. No safe box. They charge 5 euro/day for Internet. The breakfast was OK, but for a 4-star hotel the range of choices is too small. The desk staff was very helpful to sort out some questions, but that does not solve the major problems. Lastly, note that the hotel is a bit off the center, you need to pass a small hill to get there. So, 1-out-of-5 for false 4-stars. If that's the "normal" situation in German 4-star hotels, then they probably have to make their own league in order to stop misleading foreigners.