I have sensors on my lotus and i really don't like them. They were such a waste of money and they really don't work well at all, in the end i just had them disconnected because they'd beep even when there was nothing behind you! I've used a reversing camera in a merc and it works a treat i find. I also love gadgets tho so i love how you can have it on even when your not reversing to just see the traffic behind you. Plus it was not too much extra for the camera that goes with the headunit. I thought it worth it!