The location and the way the apartment looked.

The bed was not as comfortable as we are used to. The noise from people on other floors and people using the stairs. No guides on what the various remotes were for. Nothing seemed to actually work. Shower looks amazing but floor tiles are lethal when wet. No means of leaving a window / door on air vent meaning a quite stuffy warm room to try to sleep in

in the city center and very clean. From the numbers of the towels to the cups everything was perfect. When I come to Rotterdam again, I will definetely stay there.

nothing at all.