The bedroom and bathroom were clean and well-equipped, reception at check-in was pleasant, and the location was convenient. We believed we had booked a room, but ended up next door in an apartment. The hallway lights were continuously turning off, stranding us in pitch-black stairwells. While the room was clean, the hallways were dirty and run-down and our room door had no number. As we thought we would only have a room, we didn't bring food and were expecting to utilize the free breakfast. The apartment information card provides information on the breakfast hours but did not say that those people in the apartments are not eligible. In the morning, after pouring our coffee in the breakfast room, the attendant asked for our room number. When we showed him the key, he loudly, in front of the other diners, insisted we could not have breakfast as we were not hotel guests but in the apartments. He reacted very aggressively and it was quite embarrassing. It was a simple misunderstanding that could have been explained at check-in or with some in-room information. Such rudeness was not necessary!