This GPS system has worked vary well for me. The basic software that it comes with allows me to see the lakes and major roads, but for $100.00 you can purchase a program that has the topographic vision of the lake. This GPS has many features that a sportsman needs while fishing such as speed, and direction plus capabilities to track back through the same path that you just went through if you catch fish. It also allows you to setup and make a waypoint marker on any spot on the lake that you catch fish. This GPS is something I never leave home without when I go fishing.