You can reach the apartment very easy from the airport via S7 train. If you buy weekly ticket you can enjoy Vienna because their transport is well organised. The station which is very close to the apartment is Renweg. Tram 71 is going to the centre of the city for about 10 mins. The location of the apartment is very good. It is not in the centre but with their transport this is no problem for you. The apartment is heated by gas,our stay was in November and we used the heating system as described by host. His request was to not use the heating regulator more than 23 degrees which for me was not enough. There is hot water all day long. The oven runs on gas so if you don't know how to use better check instruction video. At all our stay at Vienna was very pleasant and if you like to discover more you can buy Vienna pass. We did it and it was totally worth it. The apartment is a bit overpriced in my opinion compared the other options in airbnb.