My husband travelled to Perth for work, stayed at Marina's property for 3 nights. On the first day he had to get to the apartment by lunchtime to get the key, because that's when the owner was available. On the last night of the stay the owner came to collect one of the 2 keys, because she was at work the next day. Unless you are willing to structure your arrival and departure around the owner's availability - find something else.
The apartment itself is ok and the location is very good, but having to be available when the owner can be there... that's definitely a big minus. A key lock would be such a convenient way to solve this issue!