Yep what they said GREAT Product. Its nice to sit at home on the puter go over the maps, plot waypoints on the edge of creeks or drop offs or bends what ever. Download them to your GPS then when you get to the lake you can go right to the spots you wanted to try. Then after you precisily mark brush piles or ledges on your GPS you can then down load them to the maps. There are many things you can do with those maps and a GPS. AWESOME tool to have. I don't have one of the fancy fish finder GPS combos. I just have a hand held gps but it works great and it plugs right into my puter for uploading and downloading waypoints. 95% of the time it will put me right back on my waypoints. And I do mean right on top of the brushpile.