I get sick of this endless, "the drivers are bad" crap.
they are not THAT bad .... OK, they have problems with the concept of merge .... but other than that its all OK.
Booragoon and surrounding suburbs are nice, your reasonably close to Melville, if you dont mind sailing in the river, not really that far from Safety Bay, if you like flat water on the ocean etc. etc.
One thing you will be sadly disappointed in is the public transport.
Based around Booragoon, your only public transport option is buses, with the nearest train running along the freeway, between Mandurah and Perth.
The taxi's SUCK big time, if you can even get one

You WILL need your own car for anything outside of peak hours.