The location of the apartment is the best we could hope for. Better than that would probably be in the castle itself...
The information for check in/out was helpful and accurate and the support team was reactive.
That said, as it is, I would not go back. We had 2 out of 3 mornings without hot water. The boiler was very noisy at night and the street noise was at times unbearable.
Also note that there is a kitchen, which is great to not always eat at the restaurant , but there was no basic necessities to cook (like oil).
With a better boiler and better windows, I would definitely recommend as the location is so good.