Pros: Welcoming staff, WLAN worked well, breakfast (incl. to my roomrate) offered enough variety for three days (different kinds of breads and pastries, yogurt, meats, eggs, cheese..). However, if not included to the roomrate, not worth the 10EUR as you can get a better deal at the cafés nearby (for ex. on the Pilgramgasse).
Cons: bed is a bit too soft (you realize this after sleeping on it for a couple of nights), duvet felt a bit too small (I'm used to sleeping with a double, not a single), room was a bit chilly in December (pack your fuzzy socks with you). Everything was a bit off, meaning that it is not an excellent hotel, but a good option. Price/quality ratio is OK.
From the airport, take the CAT or local train S7 and change at Landstraße/Wien Mitte to the metro. Closest stations are Pilgramgasse (a tiny bit closer) and Kettenbrückengasse (on the U3 line).