These are great for planning road trips especially trips that will take you off the major routes or out where cell reception and data plans don't work well. They have a lot of detail. I was recently out in the country on a little one lane dirt trail that amazingly enough was labeled as a road and was in this book. It was nice to be able to plan out a way to cut diagonally across the county to get where I needed to go instead of back tracking to a major route.