I have the Lowrance M68c with the transponder....persona lly I like the scroll screen far better than the flasher, I think u see more in terms of footprint with respect to fish and structure....at least for where I fish. My unit is 3 years old...I use it all year long in the shanty and on the Kayak, which I really like as I only need one finder. Easy to use, pretty intuitive with respect to programing...