I stayed in the apartment with my mother and my 2 year old daughter and it was fantastic. A baby cot was provided and there were even a few toys in the apartment and a small playground in the courtyard. We had everything we needed to prepare a breakfast. You can hear noises from the street, but it was absolutely tolerable for us. There are plenty of opportunities to buy food arount the apartment and the metro is a short walking distance away. If you are looking for a place to stay where you can enjoy Vienna independently 'in your own flat', it's perfect for you.