The apartment is beautiful - Pictures don't do it justice. Everything in the apartment is well thought out and you could not need any more amenities. Margot and Josef have gone lengths to ensure everything is provided. They have provided even the unusual items that you may need ( eg, umbrellas, emergency raincoats, flashlight)
Josef met us at the tram stop on the day of our arrival. He was very warm and kind. While walking us to the apartment, he showed us nearby restaurants, super markets, tram stop. Once we checked in, he sat with us for an hour to explain all the attractions in Vienna and how to get there with his personal recommendations. In fact, they have made a folder full of useful information for travellers, which is kept in the apartment.
The apartment is a little far from the tourist attractions; however, there is a tram stop in 2 mins walking distance. The public transport in Vienna is brilliant so you should not have any trouble getting anywhere.
I definitely recommend staying at the apartment. Would love to come back here.