I stayed by myself for 4 nights at Karl and Lisa's apartment in the 14th district in Vienna and I had a fabulous time both in the city and in the apartment itself. The bed was really comfortable, there were items like coffee, tea, water and other items provided free of charge. In addition, the water pressure in the shower was excellent with lots of hot water! also, there's a nice sitting area which is great for just enjoying a nice cup of tea or other things. Karl was very helpful and I met him once in person and he's very nice and gracious. He gave me some excellent tips for restaurants and for bars. I highly recommend the apartment to all as it is in a quiet location with outstanding owners.