We had a great stay at Max's apartment. It's beautifully decorated, with a well equipped kitchen and the comfiest bed you'll ever sleep in. We didn't get to meet Max, but his husband Robert let us in and showed us around as well as giving us some recommendations for places to eat and drink.
We had a lovely meal at a restaurant close to the apartment- Finkh on Esterhazygasse, and loved exploring the Mariahilf area, as well as central Vienna which this apartment is an easy 30 minute walk or 10 minute journey via public transport from.