We had a great time! The apartment is clean and cozy, and Sofie and her Dad were super nice and helpful. There was everything we could possibly need (save the hairdryer, but I think it's some kind of pandemic prevention? most places we stay at don't have hairdryers nowadays). The building itself looks quite old (the pretty kind of old, with an ornate staircase and everything) and is situated right next to the botanical garden, only a short walk away from the Belvedere, about 30 min from St. Stephen's Cathedral (Stephansdom), and 15 min from the train station. Cannot recommend enough, I'm still amazed we managed to book this place for our stay on such short notice :)