Communications with Celine was fantastic, she was very prompt, which gave us a peace of mind. The apartment is very new, hence everything was in tip top condition, apart from some expected teething issues. Location is fantastic, being next to a huge park with playground from the kids and within walking distance to major sights in Vienna, except for Schonbrun (which in any case is farther out of the central anyway). We are a family of 4 with 2 young kids in tow so the space just suffice. I would say after converting the sofa into a sofabed, it might be a cozy squeeze for 4 adults. This is zone 2 of Vienna so parking during weekdays is really expensive, inquire about the garage space for a fee. Otherwise it is free on the street-side parking from Friday 10pm to Monday 9am. We were there over the weekend so it worked out perfectly for us. There is lots of street-side parking space right up to the front door of the apartment, which is great if you have loads of luggage. Lastly, the apartment faces the inner courtyard so it is really quiet!