Well, hell. If you're using a thousand dollar depth finder the FB can't compare to that! The detail is good enough for me with the FB. I just want to know the depth and possible structure and if there are any fish around or if I'm just fishing in a bathtub. If the lake is deep and the fish are holding on the bottom, I know to use my full fast sinking line... I'm wasting my time if I'm trying an intermidiate sinking or dry line.