My husband and I stayed at Pension Nossek for 3 nights, and had a great experience. It is centrally located on the Graben, which makes it easy for sightseeing by foot or by metro/tram. There are plenty of great restaurants, shops and nighttime activities within walking distance. Our room faced the Graben, which meant there was some street noise, but it also made for some great people-watching from the balcony!
The rooms are well-appointed - not the newest furnishings but nice. We opted for the attached bath, and it was clean and adequately sized. Breakfast is included except for coffee, which is extra. The breakfast was okay - I felt like there was not a whole lot of variety day-to-day, so you sort of got tired of granola with yogurt/cold meat & cheese. But other than that, it was an excellent stay.
As has been noted in other reviews, this place is cash only. Think about how you are going to do this prior to arrival if you need to convert - the cheapest dollar to euro conversion is usually via ATM, but you can run into limits on your daily withdrawl amount. Be sure to let your bank know you are travelling and raise your limit before departing.More