Very nice 1-bed apartment. Has a sofa-cum-bed in the lounge which comes in handy for up to 4 people. The place is exactly as described and very neat. It is about 5 mins walk from the nearest underground which can take you anywhere in the city. It's also located right across the royal palace which is the summer residence of the royal family and the zoo.
Alexander checked us in and we had no issues at all. He also brought in a city map and recommended on the local attractions, which we found to be very useful in our escapades around Vienna. Would highly recommend Olga and Alex's place, very thoughtful folks, top communication.