The Lowrance Hook 7 Reveal with US Inland Lake Maps is a great all-around Sonar/GPS product that has features such as audible alerts for shallow water, low battery voltage, and easy menus to navigate for customization. It has many private and public lake maps that are not included in the competitors, and is long enough to mount on many trolling motors. However, it is important to note that the transducer is long enough to be a potential risk of damage.