There should be an option for showing the display with the speed on John, it's like a digital dashboard display, and shows speed, average speed, max speed etc.
Me and the wife are thinking about getting another SatNav, and going back to TomTom, as after 18 months with the Garmin, I still can't get on with it. Last night we went to my Mom's house, and it AGAIN took us down the most random back lanes for an unknown reason. Yeah, we got there, but it took about 15 longer than usual.