Really cosy and clean place, with all the essential amenities. The only downside was not having air conditioning since it got really hot even at night. Apart from that, we enjoyed our stay a lot.
We also had no problems getting to/from there since it's located right next to the main train station in Vienna, with direct trains to/from the airport.
We'd suggest moving around the city by bike: it's really easy and safe (there are bikelanes virtually everywhere) and a lot quicker and fun to get to places. Google maps also shows you directions based on bikelanes so it's pretty convenient and straight forward. We used the bikes from Donkey Republic through the app and we absolutely loved it, it was hassle free and a delight.
Overall, we loved Vienna and the accomodation contributed to this opinion.