Kiki communicated precisely how to operate the codes to the entry door, key boxes and storage rooms. It was super convenient to not have to arrange a time and place to meet to hand over keys. My flight arrived early in the day so it was very helpful to have the storage room to keep my luggage while waiting for official check in. Same for check out -- kept the luggage there after check out until my train later in the day. The apartment is huge and has all the amenities listed. Everything was in working condition. The location is great because it is quiet and appears to be tucked away from the busy centers but in reality it is just minutes away from everything. I had concerts every night booked at the Musikverein and Staatsoper, and by the 2nd night I was so comfortable traveling from the apartment that I started leaving the apartment just 15 minutes before the concert! I recommend you get some transportation pass, I got the 72 hour one. There is a grocery store nearby to stock up on food. This apartment is wonderful and Kiki is a true professional.