Heidi was very responsive by phone and text (WhatsApp) whenever I had a question or concern. The apartment is as shown but with many extra touches and excellent quality appliances, etc. I was particularly pleased that she left an ample supply of coffee pods to use with the espresso machine--enough to last a 5 day stay! There is a mini-market about 5 minutes away on Gumpendorfer, in the direction away from Cafe Sperl which, by the way, I found to be way over-rated and very expensive. For visitors from the US, beware ordering "sausage" with your scrambled eggs...what came was what looked like a cheap American "hotdog, frankfurter" sliced up into half-inch pieces, ugh! Melange was not hot either, probably left sitting on the counter by the waitress who, to say the least, was distracted.
The location of the apartment is outstanding with short walking distances to Museum Quartier, Opera, etc. Overall, the apartment exceeded expectations. There was a problem with the one year-old water heater but Heidi and her husband really made a sincere effort to fix it...just double check that with colder nights coming you will have a functioning water heater with hot water coursing through the radiators.
Overall, 5 stars and a great value for the money.