install is really easy, I and other contributed to a detailed write up on the install somewhere here in the av section
i put my sensor on the metra kit right above the decl left hand upper corner--drilled a small hole. 90% of the time its fine, in high sunlight it gets blinded so I have to reflect it off my hands lol
i think the best locale is in the center console poiting to the deck somehow
make sure you dont lose that small gasket for the sensor

if I did it over again Id do that