We stayed at Antonio's place for a week and had great time!
First, the location is perfect. You can get to all central places in Vienna by using the Metro/Tram, located 2 minutes walk from the apartment. There are supermarkets and bakeries close by, and of course the fun karmelitermarkt.
The apartment was well equipped and we had everything we needed.
Check in was superfast as we got detailed information prior our arrival. Salam was helpful, approachable and nice.
We definitely recommend this apartment!