Great breakfast, friendly staff, 2 minutes walk to U1 line Nestroyplatz station (2 stops from the center) and about 15-20 minutes walk to the center, StephansPlatz area. Great breakfast food selection. Be careful about the Covid restrictions in Vienna though, all restaurants, including the hotel breakfast restaurant requires full vaccination (3 vaccines) for adults and children over 12. We only had 2, so had to eat breakfast in our room. You can also get a PCR test in the city if you are not fully vaccinated which is good for 3 days and has to be repeated.