We loved our stay at Andrei's apartment. It is the perfect size for two people and is situated in a safe area very conveniently within walking distance of all the main attractions of center-city Vienna. (About 5 minute walk to St. Stephen's Cathedral, and around the corner from FiglMuller, the famous schnitzel restaurant.) The only time we needed to take an Uber was to go see the Schonbrunn Palace on the outskirts of Vienna. This apartment is in a residential building with full-time tenants, so if you are planning on being noisy/rowdy with your group, this may not be the best fit for you. However, if you want a nice quiet retreat in the heart of Vienna, this is it! Andrei has a guide of must-see sites and restaurants, which basically matched the research I had done before arriving in Vienna. He also recommended the cutest breakfast location near the apartment (and also responded promptly when I texted him to ask the name again since I had forgotten!). There is no A/C in this unit (for you American travelers out there), but the temperature was perfectly fine for us traveling in mid-September and there is a tall floor fan in the apartment. I highly recommend this apartment, and Andrei was very helpful and accommodating and made check-in and check-out easy.