We stayed at Philipp’s Appartement for 3 nights and it was a pleasant stay. Even though it didn’t have an elevator we made it work with three kids (one in a stroller). The apartment is very spacious and comfortable. We had everything we needed. The location is very convenient too, super close to the u Bahn and also there is the Straßenbahn around in close walking no distance. For having lived in Vienna for many years it is a good location. Since it is located close to the Gürtel you can hear the cars very well, but closing the windows it is not bad at all. I would definitely recommend staying there. Philipp was also very prompt with his response which was great.