We took Meidling train station to come in and out of the city so the location was best for us.The communication with Helene is the easiest which made our stay much enjoyable. The schloss schonbrunn is just in walking distance. There is underground stop actually very close and takes to you to karlsplatz very conveniently and you'll be at the centre to explore the must-sees by walking. The apartment itself is clean and with all the essentials and perfect for two persons! Thanks Helene! It's a highly recommended place.