The original P38 sat nav is very old technology, and this shows when using it and trying to programme destinations. I have it in mine, and currently I am looking at replacing the screen with a TomTom. My opinion is its just not worth effort. You will need a screen, computer,loom, gps aerial etc so you are looking at £400 -£500 for all the bits. But saying all that, they do work and they look quite nice.