The apartment is incredible, very clean, spacious, with all the provisions provided and only a few minutes from local restaurants and public transport.
I was there with work colleagues, working for 5-6 days. The apartment is easy to find and the hosts were very helpful in providing me with information on how to get from the airport to our home for a few days. We were shown around on arrival, although this didn't feel very welcoming but the neighbourhood is quite and a small supermarket right next door, making it ideal to get food. The kitchen, bedrooms are very well equipped and the bedrooms are all well provided with very fresh bed linen.
I suppose coming from Portugal, we missed one social room where we could work and relax, we did this in one of the bedrooms, but it would have been nice to have a lounge area for this.
The hosts were very understanding also about a key not being left, and were happy that we posted this immediately when realising our fault.
I'd highly recommend this apartment, and if I was to return to Vienna for work, would definitely stay here again.