We only used the apartment for sleeping but it was in late june and it was hot outside. As there is no air conditioner it’s very hard to get a good night sleep because there is constant fast traffic outside. The location is nice in a way that it’s very close to schonbrunn, but it’s quite far away from anything else - 15 minutes to the station and then the time it takes the public transport. The parking that the host offers is nice - Vienna in itself is safe but the apartment is next to a army compound so I didn’t worry a bit about the safety