The hotel itself is very nice and we would stay here again. It is located in a very boring, non-descript neighborhood, but its saving grace is that it is only one block away from the metro, so in this respect, its location is very good.
The only negative criticism we have, is that the staff at the front desk was not able (did not know?) how to use the public transportation system to reach Vienna airport. Currently, taking either a taxi or transfer service costs 50 euros, which is quite steep. We could not figure out how use public transportation, so we asked the front desk to order a taxi for us. BTW, taxis and transfer services should all accept credit cards, but just to be sure, before you enter a cab, ask the driver if he accepts credit cards. When we flew into Vienna and got a taxi to go to the hotel, we did not ask, When we arrived, the cost was 50 euros and the driver demanded cash only - we barely had enough cash to give him.