Simin is an amazing host. We stayed in his apartment for 3 nights and thoroughly enjoyed our time there. It is located in very nice and quiet area and within 3-5 minutes walk to the main public transport stops (underground, tram, bus) and from there it takes no longer than 10-15 minutes to get to the central Vienna so it is very convenient.
Place itself was newly renovated and has everything you need to stay. Living room is quite big and has enough space for us. Apartment also has small kitchen area so you can cook your own food if you want to.
Simin met us at check in and showed us the place and also explained how to get around, etc.
I can definitely recommend this place to stay and Simin as a host.