I currently have a Pioneer AVH-3300BT Double-Din headunit in my 2007 Ford Focus. I was considering getting the Pioneer add-on for this unit (AVIC-F220) which gives it Sat-Nav functionality but a couple of things are putting me off; 1. It costs £330. For less than this you can get a standalone unit which probably does more. 2. It would involve removing the headunit to run yet more cables, place the GPS unit, etc and to be honest, I can't be bothered On the plus side, it would be a neat all in one solution without having anything stuck to the windscreen but it's probably limited functionality wise compared with a standalone unit and I'm not sure how up-to-date the maps are and how often they are updated. Thoughts?