We have this on our Miata and it is a great product. Not only is it important to review your race data it is fun too!
Plus they just drastically reduced the price to $49.99, a great price range for a gift for your racer buddies or stuff your own stocking (we won't tell!)
Some info below but check out our website for more details and to buy: http://www.good-win-racing.com/Mazda-Performance-Part/61-0361.html
Show real-time performance statistics on-screen with gauges overlayed right on your video. Works with just about any video file format, including ChaseCam, Contour, GoPro and others. Automatically extracts data from ContourGPS video files.
Good-Win Racing http://www.good-win-racing.com