Gerta's place is clean, comfortable and roomy, and the balcony is a big plus when the weather's nice. The location is perfect if you want to be near the action without being in the middle of it. The city center is a short walk away, and Wien Mitte is even closer, which is a hub for public transportation. Gerta herself is super-friendly. She met me at check-in and showed me all around the neighborhood. The only minus about the apartment was that the Wi-Fi was slow and spotty, but other than that, everything was great. I highly recommend it.