MY daughter and Bernese mountain dog joined my husband who was in Linz for business had had 2 rooms at the Steigenberger.
Location was good for business being very close to the ringroad, although a little far out of town for sightseeing, so had to drive everywhere.
Hotel was accomodating of our slightly large dog, albeit at a charge of 10 euros per night, and we only had one problem concerning my dog barking at a large group of Russian guests (men) who were congregated around the lifts on our floor, close to our room, generally having a party and being intimidating to the guests (especially the females) and my dog who was a little traumatised by the experience and barked at them. This was at 10.30PM and some other guests complained about the barking which was badly handled by the hotel, i.e. it is ok to party in the corridor of an hotel, but not ok for the dog to get upset. This episode was not repeated since the partying guests were spoken too.
However, the dog was mosly welcome in the hotel, both in the bar and in the restaurant (on one occasion), and didn't seem too bother too many of the guests.
Hotel rooms were ok, overlooking the coutyard with a partial view of the Danube. Furnishings were ok. Bathrooms were clean, although no tubs, only showers.
Breakfasts were excellent, although a little busy at times and difficult to find a table (these were not assigned).
Generally an OK stay.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC