I am looking into buying one for my flat bottom. I have a small 12ft Waco I fish out off. I want a good unit that I can locate fish and structure with. I broke down last year and started using a trolling motor so I could fish on days we had some wind. I have done some looking around and not had a lot of luck. I will need to be able to remove it as I tow it in the back of my truck. I tried one of those fissing buddy unit and was not happy with it. I could not figure out how to catch all the fish showing to be at 20 ft in 8 ft of water. I am willing to spend up to $ 300 or $400 if it is the right one. I would like one of those $5,000 units you can see your jig on, but that might be an over kill for the flat bottom.