Stay at Gin's place was great. The apartment is close to the main train station (20min by foot) and like 40min to the centre, but there is also a great transport connection, the tram station is like 2 min from the apartment. The apartment was clean and have all the essencials. Communication with Gin was quick and accurate and we've welcome the key safe, bcoz than you can check-in and check-out at any time you need. I recommend Gin's apartment for your stay at Vienna.