The appartment is neat and cosy. It situates within walking distance from the city centre and can be easy reached by municipal transport. There are two minuses: it's quite cold and has small shower. However, there are electric heaters, so one can make the temperature comfort for itself (it may take some time). Also, while we were guesting at Maureen&Sebastian, we had no difficulties or inconveniences with shower as though it is small, but sufficient to use.
The best positive feature of the appartment is its owners. Maureen & Sebastian were friendly and extremely hospitable)
Thus, we can easily recommend Maureen&Sebastian's appartment for those who will spend their time in Viena visiting sights. And if you planing to stay all the time in shower, you may fill a little discomfort at the end of your journey.