I bought this TC810 GPS unit from AutoGPS.com.au and received within 2 days. Pretty impressive. Installed in my Corolla and it was a great unit. Don't see any issues yet but it is now almost 3 months. Got a free cam and fixed in my boot and all seems working perfect. I have not had any issues with the speed or any other feature. Will keep you posted if I get anything ... hope it will run long time. If anyone need any help with the wiring, just contact me through this forum and will assist .. This is the unit I am talking about: http://autogps.com.au/in_dash_gps_navigation_system_toyota_corolla_camry_hilux_prado.php