I stayed at this hotel for 3 nights.
Let's start with the positives: The food was excelent, I really enjoyed the large selection. The location is also fantastic—especially for cycling, as many routes are nearby.
The negatives: As mentioned quite often in other reviews, my personal impression of the cleanliness was very poor. To me, it looked like the floors hadn't been mopped at all. I also noticed what appeared to be thick layers of dust and dirt on the bathroom heater, giving me the feeling it hadn't been cleaned in years. Furthermore, I experienced the rooms as very poorly soundproofed – it felt like the walls were paper-thin, and you could hear a lot from the neighboring rooms.
Finally, to the lady at the reception: Smiling is neither dangerous nor harmful to your health—give it a try next time you welcome new guests.