We stayed for 2 weeks at Michael's place and it's a great, spacious, clean apartment in a very good location (Landstrasse). Vienna is very walkable and everything is at most an hours walk away (about 30 min to the major tourist destinations). We did use public transit a few times when we were tired and it was very easy (2 euro per person for a train ride). Connection to the airport was similarly very convenient (20 min train, 2 euro per person each way). Grocery store is 10 min walk from the apartment. This place is hard to beat. We are pretty quiet people and this is in a quiet urban area. We didn't seek out nightclubs and things like that so if you like a noisier/busier environment, maybe read a couple other reviews. We had a great time!