What a great place to stay in Vienna! At the same value level as the best low-budget hotels but even cleaner and with a nice view. I only stayed a night at Gabi's but I would definitely recommend to any solo travelers out there. Communication was great since check in until check out and this place has everything you need for a comfortable night (bed and pillow were great). Location is just perfect, next to the metro (ubahn) and just a 10 minute walk to Stephan's Dom (Cathedral).