The rooms are quite small. That might be okay but especially the doors are very bad insulated. So, if somebody is walking along the corridor the stairs or entering the room beside your room it's like somebody is walking directly through your bed. In conclusion I woke up every night several times because somebody was entering the neighbor's room.
Clearness of the floor could be better.
Breakfast was quite cheap supermarket quality: no fresh breakfast rolls no croissant. The omelette were really tasty. The service quality was very much dependent of the guy who was in charge and his mood.
So, to come to a conclusion: Amsterdam has very outrageous hotel prices. But 188 € was to much for a small and loud hotel room together with a lousy breakfast.