Martin is an incredibly accommodating host. When we arrived he was very welcoming and kind. He even took us down to the 24 hour bakery that is a minutes walk away! He also recommended many great places to explore and eat. Most of the time we had the apartment to ourselves so it was very private. The place is very spacious and well decorated with lovely comfortable bed. The apartment is a short walk to the u4 metro line which takes you straight into the city. We had no problems with transport at all, and you can also bike and use the tram. We were in a beautiful Viennese suburban street right next to the Danube river, which has beautiful parks along it.
Overall, Martin is a very funny and friendly host and we'd love to stay again. If you're looking for a quiet but still convenient location in Vienna then this is perfect.