This is a great place near all the important stops in Vienna and a short Uber ride away from Schonbrunn. We had to make an adjustment as it is much easier to catch an Uber on Burgasse 30 feet down the corner (usually 2-3 minutes) than Kirchengrasse which took about 5-7 minutes for traffic to weave it's way down.
Though the place was 5 stars for a european location, it could have been better with a microwave and some fans as it is a very hot summer in Vienna. But in general, first rate. Marina was always available.
Another hint is if you train into Vienna, you may want to pick up groceries at the big grocery in the train station rather than the two small groceries nearby the apartment.