The main advantage of a reversing camera is the peace of mind knowing there isn't a child or animal behind you, I wouldn't generally rely on it for parking, although it helps. On the LS400 there is a perfect spot for fitting the camera between the number plate lights, slightly better than mine. I then found that if you take off the boot top lining and feel around on the left hand side there's a hole in the metal work where you can go up to the parcel shelf to run the wires through, again, more difficult on the 430. The LS being a long car would necessitate the use of binoculars if you put a monitor on the parcel shelf. For me it just works out right that I engage reverse then have that quick glimpse of no obstructions behind, but I also glimpse at the monitor as I look at the door mirror.