Simply fantastic. In all terms :-)
Flexibility on check-in time, nice & tidy apartment. Peaceful, quiet, isolated, discrete (I didn't even notice when I had "flatmates" in the other rooms :-) ).
Nice, clean, well equipped kitchen. Carefully prepared labels/instructions indicating each visitor's space in the communal areas (kitchen, bathroom).
Easy to access, very well located in the city center. Friendly, descriptive guidance, it was trivial to find the place.
Great quality service overall, excellent value for the price!
Well beyond my expectations, I can only recommend :-)