Nice hotel. Clean, spacious. The location is not very good - not the best area, the road is always noisy under the windows. It takes 15-20 minutes to walk to the train station.
Not the best place in Vienna. Clearly not 3 stars. The room leaves much to be desired. The view from the window is even more so (it's a pity I didn't take a photo). Verdict: not worth the money.