This was an amazing place to stay in! It was the perfect size for a couple, with all the necessary conveniences plus more, including washing machine, espresso maker. We particularly liked the quiet location in a great neighbourhood, with easy access to public transit, close proximity to stores and restaurants, and nice touches such as extra treats left for us. There were good suggestions for local amenities, and the few minor questions were easily and quickly sorted out.
I would highly recommend this as a place for two people - any more and it may seems crowded. It is ideally located for easy access to everything one needs in Vienna, and the great local transport system made it easy to get to and a perfect base for exploring. Our only regret is that we were only there for six nights - we kept finding new streets, stores and places that we would have loved to explore more.