Vienna offers a complete range of hotels. Prices are relatively higher than in neighboring countries, or in the neighboring countryside, but quality is also often better.
In choosing an accommodation it is important to know which part of the city you want to spend time in. Most accommodations claim to be centrally located, which for the Viennese would mean they should be in or next to the 1st District, few actually are. Many are even outside the core districts 2-9. Still, all of them are located within about a 5-minute walk to an underground or at least a rail or tram station, you can get to the center within 20 minutes or less on public transportation form anywhere in the city.
A quick reminder about addresses and districts: the number preceding the street name is the district. So 9., Badgasse 26 is Badgasse #26 in the 9th district. These can also be made into a postal code by substuting it the the XX: A-1XX0 Vienna (0X for districts below 10), for instance A-1090 Vienna for the 9th district.
Smoking rooms are relatively common. Non-smoking rooms are in limited supply, and hotels with non-smoking floors are less common. Senstive non-smokers may be bothered that public areas of the hotel (often the hallway outside your room) are often heavy with tobacco smoke.