I really enjoyed my stay in this apartment. Sascha and Marina were great with communication. The apartment is pretty close to the zoo and palace of the same name, but a little bit out of the way from the other sights. However, theres a subway station near by and I must say - Viennas transit system is great! So it was very easy getting around.
The only issue I had was with the hot water - I had to ask and was then instructed how to turn it on, butbwas never quite able to figure it out. I could have messaged them again and I'm sure they would have explained it further, but I didnt mind the cold shower. It would have been nice to have been left instructions on how to turn it on, but other than that everything was great.