The GPS file is solid. Both the trackline and the route match. However if you are using the route file and autorouting software and you choose to reroute along the way, the software will want to route you off of some short "cross country" sections to nearby roads in a coule of spots. The trackline is preferred for those that can use it. Submitting specific feedback about any questionable areas on the route is a great idea though - helps to make the file as good as it can be.