The location is fine.
Service was great, everybody being nice and friendly.
The room was spacy, but otherwise rather ordinary - much like the bathroom, where the shower did not have any mixer (a bore when the hot water is 60 degrees C).
Breakfast was excellent.
If we had been charged 80-90€ per night, these conditions would have matched the price. However, the final account was 125€ per night, which is heavily exaggerated - not least compared to the information on the website, saying "Double/twin rooms from 79€").
So the bottom line is: Nice place, nice name - but even gems can be too costly.