Everything about our stay at Klaus' place was fantastic. The apartment is very modern and clean and has lots of really nice touches - it is clear that a lot of thought has gone in to how it looks. The location was great - there are restaurants in the immediate vicinity and a supermarket very close by but it's also not far from the main centre
We walked in every day and it only took us 40 minutes but there are also many transportation options close by. Next time we are in Vienna we will be sure to try and stay at Klaus' place again.