Everyone is different. If I had never been out west, the Bulter maps are kind of interesting. Free State maps such as Montana's are very detailed about what kind of terrain you are going to be passing through. Personally, when I saw a Butler map I said, "Ho Hum". Gimmick.
I see lots of bikes with GPSs mounted on them and people spending time punching lots of buttons, sometimes when underway.
My GPS is Glue, Paper, and Sheets of cardboard. I take pics of state maps and using my computer, I blow them up and edit them to sections of my trip. I then add important features like real gas stations, planned stops, and I put in distances between major waypoints. I stick these pics into a word doc for the trip...Say Reno 9-8-17 and then print them out, cut the pics that have been sized to 5 in by 9 inch, and paste them onto pieces of thin cardboard. They slide into the tank bag window and every 200 miles or so I change them. No buttons to push, not much to steal or have to worry about, no electricity used on the bike. Word doc easily changed. AAA gives me all the maps I want for free but I like them a bit bigger so I blow them up electronically. For Spares I have lots of free state maps and AAA maps.
"Google maps" is a good website for distances between points and finding things. But not alot of detail like official state maps.