I stayed 1 night when visiting the Deutschlandrally in August 2011.
The hotel is only a few minutes away from the city center (Dom, Porta Nigra, shopping area, etc. ...).
Before you book, you should bear in mind this hotel is part of an elderly home, where the permanent guests may have their 'homes' next to your hotel room. This is the awkward part. On the other hand, it did not bother me at all. People were very friendly, both residents and staff. Breakfast was served near the reception area and everything was available.
My room was huge, with a separate kitchen area and a balcony looking to the street. They should have cleaned it too, however, as there were cigarettes all over the place
All in all, this was a fairly good experience and I would recommend it if you were to look for a quiet place to sleep, with good breakfast facilities. If you would want to spend more time in your room, then you may want to look for an other hotel.