I went with my parents to Perth and this is the best possible place to stay at. Right in the middle of Hay Street, with short walk to St George's Terrace/ Elizabeth Quay/Hay Street and Murray Street malls. It's also near a couple of hotels, so when we booked day tours, we could request for pick ups there. Probably wouldn't need to drive, but I saw a carpark nearby. Just a short walk away is the river, so I enjoyed several lovely sunrises on my morning runs.
The building is secure as a key fob is required to access the lobby. The flat itself is spacious and the bedrooms had comfortable beds. Also provided were large, fluffy towels, toiletries, and even breakfast stuff. There was also Netflix, though we didn't have time to watch much, and fast WiFi. It was a bit too cold to sit around in the balcony for long, but I did enjoy getting a bit of sun out there now and then.
Flavia was amazing. My flight landed at midnight and she waited for us to arrive and pass us the keys and show us around. She had also prepared some snacks and champagne as a welcome for us. There was also clear instructions on the use of the TV etc., so there's minimal interactions if one wishes to be left alone. Otherwise, Flavia responds pretty promptly.
Would definitely want to stay at Flavia's when I'm in Perth again.