Steffi's place is in a great location - really handy for shops (two supermarkets within less than 5 minutes walk) and restaurants (lots within 10-15 walk). It's also great for public transport - a couple of minutes walk from the 31 tram which takes you to the Schottering Underground. Also buses galore. It's a quiet residential street.
The flat was nice and had all necessary bits and pieces to make the stay easy. We had mistakenly thought it had one bedroom but it was in fact a studio apartment. Nice amount of space though.
Steffi was very lovely although we had a very problematic check in (Steffi was unreachable) which led us to meeting her neighbours who weren't very pleased with her using her flat for AirBnB and this slightly tainted our trip as we ended up feeling very unwelcome in the building and felt like we had to sneak around to avoid meeting them.
But otherwise, Steffi was very communicative after the check in hiccup and the flat is nice. And Vienna is amazing!