This is my first fish finder and I've been thoroughly pleased. Although it take some time to learn, it is a great little unit and perfect for a kayak. The color screen is easy to read no matter the light conditions. Navigation through the different screens is easy to use and learn. The GPS feature is really nice and helpful with the ability to add lake chips making it a wonderful feature. The overall functionality of this as a graph and locater is flawless, especially for use in a small craft. My only complaints are with some of the more complicated features of the graph. Humminbird PC (the computer program used for waypoint storage) isn't compatible with Macs; in addition, it is also complicated to use. The other issue I had is with the built-in Uni maps, which really only serve for quick navigation and simply tracking and routing; however, there is an SD slot which allows for lake chips. All in all it is a fantastic unit with all the features a yak angler would need and some extras to boot.