Rns e aftermarket reverse camera help..

[Yolo_8p3]

i have a 2010 A3 black edition i want to add a reversing camera to it as the mrs will be driving it so what options do i have i did do a search but didn`t get a difinitive answer.

will this be any good?
http://www.ebay.co.uk/itm/Aftermark...7?pt=UK_In_Car_Technology&hash=item259dfe9da7