Excellent stay in Vienna. We chose this hotel roughly 3 days prior to our stay after a last minute trip change, and we're glad we did. While it was not the ritziest or most stylish place we stayed during our trip through Europe, it was well-located, had friendly staff, and some nice amenities.
First, the location is great for the price. It is within a minute walk of the Nestroyplatz U-Bahn station (which is on the U1 line) going straight to the city center within ~10 minutes. The surrounding area is nice and generally quiet with a few smaller, quaint cafes and restaurants. It's also in walking distance from the Danube River. There are less people around here and not as many tourist traps as you would find directly in Stephansplatz (city center). Better value for price.
Second, the staff was very friendly. Almost everyone spoke great English and was nice. The gentleman who checked us in offered great, useful advice on local sightseeing without us even asking. He also gave us an early check in to our room. Beyond check in, they made sure that we were enjoying our stay at each turn.