There is no interference from any other components (navigation/radio/bluetooth etc.).
As the camera uses the +6V that is standard output from the R10 connector pin 24, I don't think it would impact on warranty as there is no modification as such. All I did was, to use the existing pins meant specificaly for this purpose. The camera comes on automaticaly when you put the car in reverse.
It works amazingly well at night as the backup light is enought for this ultra low light wide angle camera. You can see farther and better then if you turn around and see with your eyes. Only problem is the very bright sunlight. It is a little on the 'too shinny to see clearly' side in bright sunlights.