The apartment is bigger and even nicer than in the photos. Me and my girlfriend stayed 3 nights and had no problems with anything. There are three train stations nearby which are only a couple of stops from central Vienna so very accessible. We never saw Irina but she was extremely helpful over messaging. Check in was fine, she left the key at the local restaurant. If I had to give a recommendation I would say add a toaster to the apartment as well as some better pillows but neither of these are important enough to knock a rating off. 5 stars for sure!