Zusa and Stefan are great hosts, very friendly and welcoming. The apartment is adorable, and the room is definitely a great deal. Given the amount of cake I ate during my trip to Vienna, I didn't mind the four flights of stairs or the short walk to the subway station/main tourist attractions of the city, but it's something to be aware of. Given how pricey a lot of the other places are in Vienna, this room is totally worth a bit of exercise! There was also an issue with the water heater during my stay, but they made it right, and I would absolutely stay with them again. And because they rent the room out regularly, there is a really helpful drawer full of maps, flyers, and anything you might need to make your visit fun - now including my Vienna guidebook in English. :)