It's absolutely nice and comfortable apartment for the reasonable price. Location is great: quiet but not far from the center of the city. Main train station, Belvedere, Rathause, Art historical museum, Shonbrunn castle and other great places are just 45-50 min to go by foot. Tram or bus would bring you there even quicker, but I would recomment to walk, 'cause Wien is beautiful and you will enjoy every minute of your tour!